Reign (Supergirl)/Synopsis

Samantha Arias, also known as Reign and by her title "Worldkiller", is the main antagonist in the third season of TV series, Supergirl.

Origins
The Kryptonian world killer known as Reign, according to a Kryptonian hologram, is the culmination of years of Kryptonian research. The same hologram appeared as an apparition and stated that she was born from Rao's fire, although it is currently unconfirmed to be true. But it is known that she was born on Krypton in 1979. On the day of the planet's destruction, Reign, as a baby, was place inside a Kryptonian escape pod by a group of hooded figures and sent to Earth, saying that she would grow strong there and that she would then "reign". According to cult leader Thomas Coville, the world killer Reign's legend existed long before the book of Rao.

When her pod landed on Earth, Patricia Arias found her, took her in and raised her as her daughter, Samantha. At some point prior to turning 18, Samantha became pregnant and was forced by Patricia to choose between home or her child. After choosing the latter, she was kicked out of the house and the two of them became estranged since then. Samantha then eventually had a daughter whom she named Ruby. However, unbeknownst to Samantha, her pregnancy also delayed her manifestation as the Worldkiller, "Reign".

Learning Her Powers
Samantha and Ruby both attended the Supergirl statue unveiling by Lena Luthor. She encountered DEO agent Alex Danvers there when Ruby ran into her and Samantha made Ruby apologize for it. During the attack at the unveiling, a metal bar fell on Ruby. Samantha, frantic and desperate to save her daughter, lifted the intensely heavy beam, much to her surprise. She later went to bed that night, but woke up after having a nightmare of Supergirl's mother Alura Zor-El turning into a hideous monster.

Sam drove Ruby to school the next day, and while they waited in the car, Ruby questioned her about what happened at the unveiling. Ruby believed that her mother had superpowers, but Samantha explained to Ruby that it was nothing more than an adrenaline rush, caused by seeing her daughter in danger and that it happened to a lot of mothers. Ruby didn't believe her and continued to insist that Samantha had superpowers.

Later that day, moments before entering a meeting, Sam was called by the principal of Ruby's school and was informed that Ruby had been in a fight. When inquired, Ruby informed her mother that she got into the fight because a girl in her school called her a liar for saying that her mother had superpowers. Samantha tried to convince Ruby again that she didn't have powers, which caused her to yell, and Ruby to run off. Sometime following, Samantha received delivery pizza and took it to Ruby's room, only to find her gone.

She messaged Ruby and asked her where she was, and Ruby told her mom, her location. Samantha ran out and found Ruby in the midst of an attack by the telepath Psi, and moments before they were crushed by a wrecking ball, Supergirl saved them. Samantha talked to Ruby after the attack and realized that Ruby wanted her to have superpowers so that she wouldn't have to work, and could just save people and spend time with her. Samantha then reassured her daughter that she would always spend time with her, no matter what.

Later, she appeared at CatCo where she met Kara Danvers, and revealed that she was hired at L-Corp to be the acting CEO while Lena Luthor adjusted to her new business. At home, Samantha had trouble sleeping and, while searching for light bulbs, found a crowbar. She remembered what her daughter had said and tried to bend it, but failed in doing so.

Working for L-Corp
Samantha attended one of Ruby's soccer games and proudly cheered her daughter on from the sidelines. She took a call during the game and stated that if JQB has a problem with the deal she was trying to set up they can contact her directly. As she was talking, Ruby scored a goal and asked her mom if she saw it, and Sam covered by shouting that she did and that Ruby did a great job. A woman walked up to her and asked which child was Sam's, and Sam pointed her daughter out and jokingly stated that she wasn't sure how Ruby was so coordinated since she herself isn't. She asked the woman which child was her's, but the woman reflected and stated that Ruby was special and was chosen - they both were, and handed her a flyer for a meeting. Sam asked for the lady's name, and the woman stated that she was a follower and asked her to bring Ruby to the community. Sam forced a smile and thanked the woman who walked out.

Lena and Kara arrived at L-Corp moments before Sam walked in. She then told Lena that the JQB merger should be finalized any minute and handed the papers to Lena, who signed them. Lena asked how she was planning to celebrate her first big merger as CEO, and Sam just chuckled. Kara invited Sam to her girls 'night, and she initially declined but after being pressed a little more by both Lena and Kara, she agreed to attend. She asked what to bring and Lena told her to bring booze - but not tequila. Kara found the flyer the woman from Ruby's soccer game gave her and asked her about it, and Sam told Kara what had happened and let Kara take the flyer.

That night at girls' night, Sam met Alex and Maggie and drank some wine. She asked Kara about her relationship status, and was saddened to hear that Kara's boyfriend had "moved away". Alex asked Samantha if Ruby's father was still in the picture, and Samantha quickly stated that it was just her and Ruby. Alex was impressed with Sam's ability to raise a daughter on her own and asked how that was possible. Sam thought for a moment and stated that it wasn't always done gracefully, she was normally always behind on something and that Alex and Maggie would see when they have kids. Alex informed her that they weren't going to have children and were just going to be the cool aunts, and Samantha stated that it was great and Ruby would love that. She then apologized for assuming but was quickly assured by both Alex and Maggie that it was fine. Lena then chimed in and told Sam to put her down as another cool Aunt, and Alex told her to put Kara down as a slightly nerdier Aunt, which made Samantha really happy.

The next day at L-Corp, Ruby was doing her homework on the floor and asked her mom to help her with her song. Samantha asked about Ruby's French project and was surprised to learn that her daughter had finished all of her homework and she apologized for being so busy. A man entered the room and informed Samantha of a problem with the merger, and Samantha started to deal with it much to her daughter's disappointment.

Later that night she entered her office to find Ruby asleep on the couch and placed her own jacket over her daughter. Lena entered and the two discussed the merger, and Samantha told her that the merger was finalized, and Lena congratulated her on it. Sam smiled lightly before she started to cry and apologized for being unprofessional. She then confided to Lena about her screwing up with Ruby and the fact that all Ruby wanted to do was practice her song, but she was too busy with work to help her, and that she felt like the worst mother. Lena comforted her by saying that it was herself who had the worst mother and that Sam was doing just fine, but Sam responded that her daughter fell asleep on her couch at work and that wasn't great. Lena told her that Ruby fell asleep watching her mom work hard, and that was how you raise a girl to be a bad-ass. Sam smiled and mentioned that Ruby already was a bad-ass, and Lena agreed and told her that it was because she was loved and knew it. Sam only smiled in response.

At Ruby's play that night, Sam was surprised to see that Lena, Kara, and Alex actually came to support her daughter. She was also happy to hear that they were ready to be the cool Aunts. Sam then proudly watched her daughter sing her solo beautifully, and took pictures as she performed.

At the end of that night, Sam ran a bath and took some medicine. When she looked in the mirror, she was horrified to see herself covered in strange symbols. She heard whispering behind her and turned around and was terrified to see a woman in a cloak standing behind her. The woman stated that she was born from Rao's fire, and Sam cowered on the bathroom floor in fear. Ruby entered the bathroom and worriedly asked her mother what was wrong, and Sam check her hands and noticed that the symbols were gone.

Clearing Lena Luthor's Name
Samantha dropped Ruby off at school the next day, and Ruby asked her mother about what had happened the night before when Sam was cowering in fear in the bathroom. Sam stated that it was just a bad dream, but Ruby, confused, retorted that she was awake. Sam then told her that it was a migraine and that it was time for school. They hugged goodbye before Ruby climbed out. As Sam was preparing to pull away, a friend Ruby was talking to collapsed on the ground and started shaking. Ruby shouted to her mother, who quickly ran over to help.

Later, at Luthor Family Children Hospital, Samantha was seen hugging a woman (presumably the mother of the collapsed boy) and looked worriedly after the woman. Moments later, Lena and Kara arrived and asked why she was there. Sam told them what had happened, and that the boy was diagnosed with lead poisoning. She also remarks that Morgan Edge's stunt was awful, and the whole situation is bad. She then watched from a distance as Lena and Kara confronted Morgan Edge.

She then joined Lena and Kara at CatCo to discuss the issue and whether or not Lena's lead bomb could have been responsible for the children getting sick. She told Lena that there could be hundreds of other reasons that the children were getting sick, and backed Kara's statement of Morgan Edge by saying that he is ruthless. Lena wasn't convinced and Sam responded by saying that the device saved everyone in the city, including herself. James joined the room and recommended that Lena step down from CatCo, which Lena agreed to, and went further to say that she was stepping down from L-Corp as well. Sam disagreed and told her that they need Lena to help with the research, but Lena assured her that the company could handle it and that she didn't want to be accused of tampering with the research. When an angry parent arrived at CatCo and confronted Lena, Sam was seen behind Lena and was horrified to hear the mans story.

At a press conference later that day, Sam stood off to the side of Lena and showed her support for her friend. A shooter open fired at Lena, which caused panic throughout the crowd and Sam jumped out of the way and laid on the ground until the shooter was apprehended.

After the conference, Lena stayed at Sam's house and expressed that she didn't want to put Sam and Ruby in danger. Lena told her that it was fine and that the woman was in custody, Ruby was at a friends house and went on to tell Lena to take her Louis Vuitton's off and drink some water since she was probably dehydrated. Lena pressed that Sam could have been shot and she shouldn't be hiding her, but Sam assured her that it was fine. She stated that Lena gave her a break when she needed one the most and that she wanted to return the favor. Ruby walked out with pillows and blankets, and Lena agreed to spend one night at the house, which made Sam smile and say that this is what friends are for. Lena asked that if Ruby was sick if Sam would still be her friend, and Sam simply looked up at her not speaking.

That night, Sam returned home from a late night at work to find Lena passed out on the couch and Kara still at the house. She thanked Kara for staying and that even though she's known Lena for a long time, she had never seen her like that. Kara responded by saying that Lena wanted everyone to think she was tough, and Sam agreed and finished Kara's thought by saying that Lena was all mush inside. The two women then banded together to try and figure out if there was a pattern, but all the kids infected were scattered and that there wasn't a pattern. Sam decided to follow a lead on finances between the kids and had all the finances for the parents pulled up in a matter of minutes. The two noticed that everyone went to a food truck located at the park for Oktoberfest on the same day, and thought that it could be something in the food.

They then went to the park but all the trucks where gone. That led them to a building in the park that the kids may have gone into. However, when Sam tried the door she found that it was locked. When she wasn't looking, Kara broke into the door and covered it up by saying it was just a sticky hinge. They entered the building and Kara remarked that Eliza used to bring her somewhere similar, and Sam asked who Eliza was. When Kara responded that Eliza was her adoptive mom every Tuesday and Thursday, and Sam was surprised and stated that she was adopted as well. However, her place was Monday's and Wednesday's. As they walked past the pool Sam remarked that Ruby loved swimming and so does every kid. When Kara x-rayed the pool, she noticed that something odd was in it. She tested it and sent it to Winn, and Sam remarked that Winn must be a good friend to have, believing him to just be a friend of Kara's at the FBI. Both were surprised and relieved to hear that Lena wasn't responsible, but they were horrified to learn that someone put a dangerous compound in the pool that mimicked the symptoms of lead poisoning.

After Supergirl saved Lena, the three girls returned to Sam's house where they drank wine and talked about the day. Sam relayed the message that the synthetic antidote that L-Corp made was working and all the kids were getting better. Lena thanked both the girls for their help, and Sam agreed and stated that she and Kara made a pretty good team. Kara smiled and stated that it was more than pretty good, and the two clinked their glasses. Lena stated that she never had anyone who loved her despite her flaws before, and Kara remarked that was because she never had a sister before and wrapped her arm around Lena. Sam smiled and stated, that Lena has two sisters now, and joined the group hug which caused everyone to laugh and smile happily.

Later that night, after both Lena and Kara had left, Sam tucked Ruby into bed and assured her that the boy who was sick was going to be fine. Ruby stated that she liked her mom's friends which made Sam happy, and she stated she liked them to, but she liked Ruby better. She gave her daughter a kiss on the forehead, and Ruby remarked that there was a hole in her mom's shirt. Sam found it weird and said goodnight to her daughter before leaving the room. She went to the kitchen and shook out her jacket. A crushed bullet fell out, and to Sam's shock, she realized that she had been shot. However, she wasn't wounded and the bullet had been crushed after hitting her.

Discovering her true identity
Samantha was preparing dinner for Ruby and herself, and immersed in the doubt of whether she had powers or not. In order to test her suspicion, she put her hand in the boiling water without Ruby noticing and saw that nothing happened to her hand. Surprised, she told Ruby that she had to go back to work and that Ruby would go to Tess' for dinner. Ruby tried to protest, but Sam snapped at her, saying it wasn't up for debate.

She then drove out to her adoptive mother, Patricia Arias' house for information. She knocked on the door and Patricia welcomed her in. She brought tea for Sam and asked how Sam's child was doing. However, she floundered as she didn't remember the child's name, and Sam quickly stated that the child's name was Ruby. Patricia attempted to brush this off by saying that Sam couldn't expect her to remember the name of a child she had never met. Sam was upset by this remark and started to leave, but then informed her of the events at the Luthor press conference. She then pressed on and asked if as a child she did anything strange. For example, if ever had a really bad fall or lifted anything heavy, and Patricia firmly stated no and tried to change the subject. Samantha, however, persisted and asked about her birth mother. Patricia then took her to the barn and showed her the pod that she found her in. She stated that she never adopted Sam, she found her, helpless and scared as a baby in the pod. Patricia said that she planned to tell her when she turned eighteen, but she had left by then due to the pregnancy. Samantha examined the side panel of the ship, and this caused the pod to turn on and a beacon emerged on the front side of the ship.

Later, Samantha told Ruby she would be going out to find some answers and promised her she will tell her everything once she got back. She also left money for takeout and told her that the sitter would be arriving shortly. She then took the beacon she found from the ship and followed its light out and into the middle of the desert. However, when her car broke down she was forced to go on foot. She followed the beacon's signal to the middle of a clearing. All of a sudden, the ground shook and pikes made of rock emerged to form a huge structure.

Samantha went inside the structure and placed the beacon into a console panel that caused everything around her to activate. A holographic projection emerged, similar to that of Alura Zor-El, and told her she had answers to her questions. Samantha told the projection that she had seen her in her dreams and asked who she was. The projection responded by saying that was science, magic, information, and a friend. Sam asked what the place they were in was, and the projection responded by saying that they were in the Fortress of Sanctuary, a piece of her world, the dead planet Krypton. Familiar with the tale of the shattered alien homeworld, Sam was shocked to discover that she indeed had powers and realized that if she was Kryptonian, she was like Supergirl. The hologram corrected her and said that she was more than that. Samantha pressed her about this, and the hologram stated that she was a "Worldkiller", a genetically engineered being designed to "execute justice". Sam thought this meant that she was destined to become a hero like Supergirl, but the hologram stated that mankind would not see her as a hero. Instead, they would try to contain her power to no avail. She would dispense justice without mercy, and cause Earth to burn.

Sam rejected this instantly, saying she was a good person with a life and a daughter. The hologram coldly stated that Ruby delayed the full manifestation of her powers. Sam was angered by this and snapped that Ruby was not an error. The hologram assured her that she would eventually forget about Ruby and all of her other mortal trappings. Sam rejected this, saying she would never become that person. The hologram told her that it was time for her to fulfill her true purpose as 'Reign'. Sam screamed and doubled over in agony; as it turned out, her powers were manifesting in full. She suddenly stopped and raised her head in a calm, almost peaceful manner, and stood up. When she opened her eyes they turned a bright red, she fully became the world killer Reign and she eerily stated, "I have awoken" in ancient Kryptonian.

The Rise of Reign
Sam awakes from a nightmare in her bed when Ruby enters. Ruby asks about her trip, but Sam has no memories of it. Sam and Ruby are invited to Kara's Christmas Party, in which Sam is late with the biscuits. She and Kara then start pushing Lena into giving James Olsen a kiss. Kara then tells them about how she is glad of the pair of them as her best friends. The next day, Sam is working when she watches the news mentioning about a gang. She gets angry at this when Ruby comes in, and the two argue about Sam not going home together. Sam calms her down by remembering a previous Christmas. She then gives Ruby her present, which is a necklace of the Supergirl Symbol. Reign takes over soon after and kills all the gang members that were mentioned. Sam hears about an assassination attempt on Lena and asks her about it. Lena knows it is Morgan Edge but has no proof. Sam looks at the picture of Edge and coldly says that he should be dead. Reign takes over and attacks Edge's Christmas Party, Edge though escapes by hiding in a panic room, lined with lead, Reign leaves while Edge blames the chaos on Supergirl.

Supergirl leaves a symbol on the roof of CatCo, in which Reign arrives and waits for her. The two converse in which Reign tells her that she is dispensing justice. Supergirl however disapproves of how she is doing it, not going to allow her to keep killing, causing the pair fight which rages throughout the city. As the fight goes on they seem to be equal but Reign eventually proves to be much stronger than Supergirl, making her bleed and wounding her so much that Supergirl becomes powerless against her. Emerging victorious, Reign states she will continue her way of justice before dropping Supergirl from a building.

She then returns to her home, and in the morning Ruby comes downstairs calling for her mother. Reign turns around quickly, leaving Ruby's fate unknown.