Purity (Supergirl)

"I see right through you, Alex Danvers. It's a gift I have. To see inside people. To know them. You want to hurt me because you're hurt. You want me weak because you're weak. Someone cut something out of you and you feel the hole every day. A hole you dug in yourself. And it's not getting any better now, is it? See the rage? That's her [Alex] loneliness. You had your chance at happiness and you threw it away. And now, you're just a broken little doll."

- Purity using her powers to torment Alex Danvers "I am the scalding light. I am the flood that sweeps away sins. I am the word and cry of justice. I am Purity."

- Purity introducing herself to Supergirl Julia Freeman, also known as the Worldkiller Purity, is a major antagonist in Season 3 of Supergirl.

Along with Reign and another Worldkiller, Purity was sent to Earth upon Krypton's destruction and was raised under the name "Julia Freeman". After many years in dormance, Julia's powers began to manifest and this also "awakened" her alter-ego. This put her into conflict with Supergirl and the DEO, until eventually being recruited by Reign into her cause.

She is portrayed by Krys Marshall.

Biography
Purity was born on Krypton with a bio-genetically modified physiology, like Reign. Upon the planet's destruction, Purity, along with the other Worldkillers were sent to Earth.

After being accidentally hit by a car, Julia survived the impact, where she then discovered that she had superpowers, including super strength, but this also started to awaken her alter-ego, Purity.

A few days later, she was home, listening to some music in her house, where Supergirl and her D.E.O. team raiding her place. Once she discovered Supergirl, she quickly became terrified, unintentionally triggering her Purity persona. Purity had then taken down the D.E.O. agents sent to take her down with her scream. With J'onn being the one to arrest her, she was then sent to the D.E.O to be interrogated by both Supergirl and Alex, where Supergirl tried to get through to Julia and Alex tried to threaten her. Using her clairvoyance, she sadistically unnerves them both, particularly Alex about her failed love life with Maggie, before escaping after discovering Reign's search for her. However, while calling for her "sister" in the subways, she then battled Supergirl and her allies in the subway until eventually, Alex reached out to the part of her that is still Julia. Reign then shortly arrived after Julia's breakthrough and threatened Alex's life. Julia offered her life for Alex to be spared. Reign then flew away with Julia and took her to the Fortress of Sanctuary, where her alter-ego was then fully manifested by the hologram.

Powers and abilities
Due to her origins as a Kryptonian, Purity does share similar powers to Reign, Supergirl and Superman, including super strength, flight and invulnerability. However, unlike other Kryptonians, due to being bio-genetically modified as a Worldkiller, she appears to have different abilities as well, including a super sonic scream that can even render Supergirl unconscious, a sonic inducement that can she can use to induce in her enemies that is similar to vertigo, and also clairvoyance where she can feel other people's feelings, which she notably used to successfully torment Alex Danvers about her failed love life. Due to these abilities, she is able to go toe-to-toe with Supergirl, Mon-El and Martian Manhunter, and be able to beat them easily. It is, however, unknown if she is just as powerful as her fellow Worldkiller Reign.

Season 3

 * Episode 11: "Fort Rozz"
 * Episode 12: "For Good" (flashback)
 * Episode 13: "Both Sides Now"

Trivia

 * Unlike Reign, who is an adaption of the villain from the comics, Purity is an original character. However, her origins are still adapted from the comics.