Trigger Warning for SA in regards to Anne's actual canon backstory:
Anne was a particularly attractive girl who grew up in Finland and moved to Japan. She ended up attracting the attention of Suguru Kamoshida, the volleyball coach of her Academy.
Mister Kamoshida would make subtle advances on Anne, even asking her out on dates, which she reluctantly accepts under the terms that she will not accept any sexual advance from him, keeping him at bay. He even goes so far as to blackmail her into a sexual relationship.
Her repeated resistance to his advances causes him to go after her best friend Shio and sexually violate her. Which leads to her going for a failed suicide attempt.
Kamoshida also creates a Cognitive Existence of Anne, a cloned copy called Princess Anne, who functions as a loyal slave. All to pull her to him.
Anne works as a Phantom Thief to help people and fight against people like Kamoshida.
Anne loves sweets like cakes, and has a personality that works as a mediator.
She is confident about her body but often snaps at people that tries to take advantage of that.
She also works as a Model part-time, as both of her parents are Fashion Designers, that are always traveling abroad without her.