If ure talking about Breillat...
1-You need to create a new character...Choose anyone, it doesnt matter.
2-Then begin the game, u'll be in a ship
3-Go inside the ship...(the yellow triangle sign, its situated just on the right)
4-Then inside, u'll see a girl named Breillat.
5-Talk to her 10 times.(click on her)
6-After, she will ask you if wanna change identity.
7-Just accept, and there you go ^^ Your character became Breillat :)