Anna is Lina's other half. She has no eyes and can see your likes, dislikes, strengths, weakness's, personality, etc by looking in your direction although she can't see you properly. (Edited to she doesn't exactly know, just subconsiously has a feeling on whether your good or bad or what might get under your skin)

Anna is an experiment like Lina, also rescued with Lina as she was never apart from her. That main idea was Anna would aid Lina in protecting the FBI by telling her the targets information so Lina can shapeshift and betray and kill them or steer them away.

Unlike Lina nothing went wrong with her, apart from her eyes falling out, she just wasn't much of a concern for the biologist that made her so she wasn't made to be corrupted.

She has a bush with a single rose marking just below her neck although it seems to be apart of her skin and won't come off until she is assigned to a new person/place/object to protect.

Anna can't feel anything physical. This includes pain and pleasure, although, Lina feels everything Anna is supposed to. This helps Lina calm down whenever Anna isn't with her as she knows she isn't dead unless she feels a huge pain.

Anna still has her hair color, would have her eye color, and her skin color. Nothing changed with her. She remembers everything but vowed that it would stay a secret forever.

She hides her knowledge with childishness and mischievious pranks. Anyone who knows her would think she's simply a child that never grew up.