Julia Freeman

Julia Freeman is a woman that survived a car crash. She has been seen by Kara in her visions as one of the Worldkillers known as Purity.

Biography
After surviving a car accident, Julia then discovered she had managed to survive this through her newfound abilities.

Later she had gone home, listening to some music in her house. Unaware of Supergirl and her team raiding her place. Once she discovered Supergirl, she was terrified, triggering her Purity persona. Purity had then taken down the agents of the D.E.O. sent to take her down. With J'onn being the one to arrest her. She was sent to the D.E.O only to be interrogated by both Supergirl and Alex. Getting both of them unnerved before escaping after discovering Reign's search for her. However 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 arrived after Julia's breakthrough and threatened Alex's life. Julia offered her life for Alex to be spared. Reign then flew Julia away.

Powers

 * Sonic scream: Purity can emit a high frequency sonic scream that is powerful enough to knock a fully grown Kryptonain feet away into a wall. She was also able to knock supergirl unconscious with her Scream. Her scream can also be used as a force projectile, as she was able to break down a whole train station just by screaming at it.
 * Sonic inducement/Sound projection: With a slight clench of her hands, Purity, is able to induce vertigo, vibration, and a sonic sound in her immediate vicinity. She was able to shake and vibrate the whole D.E.O facility, and cause anyone near her to feel the effects of a migraine, and have ringing in their ears. The effects of the ability even allow her to stun, explode, and push back multiple objects at once, and even stun normal humans, as shown when she almost knocked out Wynn while using this ability.
 * Clairvoyance: Purity says she is able to ‘see’ into people, and is able to read peoples personalities, and look deep into their psyches. Unlike a telepath, she cannot see into their minds, or read thoughts, but she is able to feel emotions, experiences, and personalities from people within a matter of minutes, just like she did to Alex.
 * Super strength: Purity has demonstrated a high level of Super Strength, as she was able to break Supergirl’s legs by slamming them into ground, and contend and eventually beat Supergirl in a one-on-One brawl, as well as punch Mon-El into a stand, which shattered on impact. She was also able to keep with Mon-El in hand to hand combat, as well a dominate the combined forces of Supergirl, J’onn J’onzz, Alex, and Mon-El. She also managed to nearly choke Supergirl to death. It is unknown if her Super Strength is as powerful as Reign’s, but from her demonstrations of Super Strength, it would seem so.
 * Supersonic flight: Purity has the ability of self propelled supersonic flight. Though she has only been seen using this ability twice, it is implied that she can fly at speed as fast as Supergirl, and has been shown to be able to hover and levitate as another application of her ability to fly.
 * Invulnerability: Purity was able to take multiple punches from Mon-El and Supergirl, without being fazed. She was able to fly through a hard glass wall without showing any signs of damage as well.

Abilities

 * Expert combatant: She is shown to be a capably fighter.
 * Singing/music: She is shown to be adept at singing.
 * Multilingual: Julia is capable of fluently speaking English and after her awakening, Kryptonese as well.

Weaknesses

 * Dual personality: Julia's full powers are not truly available to her own discretion. Apart from her invulnerability, only in moments of extreme stress can she access some of her other powers, and not at full capacity. Once her programming was awakened, as Purity, she has full access to her powers, but becomes completely unaware of it. Her separate persona as the world killer is completely void of all her past memories as Julia and upon reverting to her normal-self, remains completely oblivious to all actions as Purity.