This is Claire from an alternate Resident Evil timeline. She's 15 years old. She was experimented on by umbrella along with other children. Her eyes change color based on her mood : 
1.Red if she feels threatened/angry
2. Yellow if she is curious/doubtful
3. Brown if she's calm
4. Black if she has permanently lost her way
5. Green if scared

She has the ability to transform to zombie and back. The more humans she kills, The more her human part dies. Too many kills and she'll be a zombie always