CE: Taking Over

Art by me. Trying to keep it simple. Vector with some photshop edits.
for 's Contest fav.me/d6ewwcd

Characters Rasumi Barasui (c) by Pinlin
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Character Bio:
Rasumi is born as angel. Her parents abandoned her because she isn't 'pure' because of her black hair and red eyes. Later an angel family adopted her. Her new stepbrother and sister didn't treat her nicely because she looks different. She continued to live with a forced smile.
At young age her dark side developed from the sadness in her heart. To protect herself, her other side pops up randomly to knock out the bad people. Somehow the innocent side never realize what happend after. At age 16 she left her family and live on her own. She joined the rescuers to create peace in the world. She wish that nobody will suffer the pain she had gone through. Although, her dark side wish for something else. What could it be and who is the 'real' Rasumi?