Rita Repulsa (Power Rangers 2017)

Rita Repulsa is the main antagonist of the 2017 reboot of The Power Rangers. Starting from 2017 film, the origin of Rita Repulsa was rebooted to made her more ruthless villain and a fallen hero who has not hesitant in mutilating and/or killing people. Here, she was originally one of ancient generation of Power Rangers who betrayed her fellow Rangers to take Zeo Crystal to gained power over life and death. Her fellow Ranger generation Zordon and the rest of the Rangers fought her, which ends with Rita entered comatose and near-death state in ocean while Zordon had his spirit transferred to Morphing Grid through their ship's systems.

Background
In the earliest days in Cenozoic Period of Earth where the last dinosaurs still remains albeit with their numbers dwindling, the ancient generation of Green Ranger, Rita Repulsa, for reasons that yet to be revealed (albeit indicated that she switch sides with Lord Zedd), turned against her fellow Rangers and came to Earth to take the Zeo Crystal, a powerful artifact with which she could harness the power of life or death. She knew the crystal's extraction would render all life on Earth extinct, but doesn't care.

To carry out her plan, she forged a special staff that enable her to create an army of golem-like creatures called Putty Patrollers and a golden monster named Goldar that can pull Zeo Crystal from Earth's surface as well as serves her as her sentient superweapon comparable to Zords. Her former allies Zordon and the rest of the Rangers against her, but they ultimately lost the fight, as Rita managed to kill all but Zordon himself.

In a last-ditch effort to stop her, Zordon ordered Alpha 5 to redirect a meteor in her and Goldar's direction. As result, Goldar was destroyed while Rita sent flying into the bottom of the ocean. The meteor impact also nearly killed Zordon and render last dinosaurs extinct, but Alpha 5 managed to sent him into Morphing Grid to keep him alive.

Modern day
In present day, Rita's seemingly lifeless body is fished out of the ocean by boatmen. They thought Rita's preserved body already dead long ago, but unaware that her powers keep her alive all these million years, and upon awakening, she immediately killed them and set out to Angel Grove.

Old and withered due to age and lack of nourishment, Rita searches for gold to be absorbed as means to rejuvenate herself and restore her powers. Perhaps due to either her aeging effect damaged her brain or simply esperate to restore herself, she stole gold from anyone and anything she can find, often brutally murdering her victims in process and making news in Angel Grove. Eventually, Rita fully regenerated. when she comes upon one of Angel Grove's jewelry stores.

Sensing presence of other Rangers near her, she invades the home of the said Ranger, Trini Kwan, and demanded her the whereabouts of Zeo Crystal. Unable to gain information from her, Rita deduced that Trini's fellow Rangers know the crystal's location. She then morphs into her battle-damaged Ranger suit to introduced herself and reveals that she killed Trini's predecessor in the past before goad her to rally her friends to met her at the docks.

The Rangers later confront her at the docks to defeat her. Unfortunately, they yet to be able to mastered the ability to morph that gave Rita advantage to subdue them. She then threatened to kill Zack if any of them refuse to tell them the crystal's location. This prompt Billy to told her the crystal to save Zack. Though she got what she wanted, Rita unexpectedly killed Billy by strangled him to death and dropped his body to the water to retain her respect with Zordon. Afterwards, she left the demoralized Ranger brought their dying friend back to Zordon's ship.

Now with her restored powers reached its peak and knows where Zeo Crystal is, Rita entered a gold mine to reconstruct Goldar and an army of Putty Patrollers where she sent a squadron of Putties to obliterate remaining Rangers and delay them. Though the Rangers, with newly revived Billy quickly decimated the Putty squadron, they delayed the heroes long enough until Goldar fully resurrected. In response, the Rangers piloted their superweapons, Zords, to combat Rita, Goldar, and her legion of Putty Patrollers.

In the heat of the battle, Pink Ranger, with her Pterodactyl Zord, combined her strength with Blue Ranger whom piloted his Triceratops Zord by hurling the latter's Zord through Goldar, destroyed him into pieces. Even so, Rita counteract this by restoring her sentient doomsday weapon and upgrade him with more weapons. This ultimately escalated the battle to the whole new level as the heroes combined their words into a Megazord that battles Goldar. Ultimately, Rangers' Megazord emerges victorious. Rita erupts out of Goldar's melting form and screams at the Rangers to wait and listen to her. She yells that even though they may have stopped her and Goldar, other villains will still come to collect the Zeo Crystal themselves (hinting at Lord Zedd's potential arrival in the future) and that what the team has cannot last, screaming that they know she's right. Jason responds that they don't know for sure but will stand firm and order her to turn herself in to be judged by Zordon. This infuriates Rita to the point that she flies at the Zord, only to suffer a humiliating defeat when the Megazord literally sends her to the sky with a backhand slap (Jason giving Trini the order to counterattack with the Zord's right hand at the correct moment), launching her out of Earth entirely.

In space, near the moon, Rita smiles as she finally freezes in the vastness. It's unknown whether she can also survive this.

She is presumed return in the sequel.

Abilities
Because in film series Rita depicted as former Ranger, she possesses all powers and abilities that typical Rangers had where her physical attributes enhanced by Morphing Grid to superhuman level and access to morph into her Green Ranger suit. Although, her Green Ranger suit sustained severe damage that left her face and some portion of skin of her right arm exposed, which she left that way as remainder of her betrayal against her fellow Rangers' generations she killed in the past. Also, everytime she accessed her morph to don her Ranger suit, she had some small protrusions grew under her exposed skin for some reasons.

Although, how Rita managed to kill her fellow Rangers was not just her experiences as one of them, but also through meddling with powers within her power coin that made it somewhat "corrupted" compared with titular heroes' still intact power coins (which may also contributes slight mutations she had in her Ranger form. Through the said meddling, Rita gained the ability to manipulate earthly materials such as gold, rocks, concrete, etc. to create sentient army of golem-like monsters called Putty Patrollers and a sentient doomsday weapon and monster made of reinforced gold named Goldar. She usually performed this through special staff she forged from gold and had her power coin embedded on it as both conduit of her terrakinetic powers and melee weapon.

Trivia

 * She was portrayed by Elizabeth Banks.
 * Before her final defeat in the 2017 film, she states that others will come for the Zeo Crystal, this may include Lord Zedd, Ivan Ooze, King Mondo of the Machine Empire, Divatox, or even Dark Specter.
 * Promotional material before the film's release stated that she was originally to collect the Zeo Crystal for Lord Zedd, hinting that he is the mastermind of the movie's events, however in the film she does not mention Zedd and instead desires the Crystal and the universe for herself, implying that she has either betrayed him or was planning on doing so before her freezing in space.