Wesker woke up after being "killed" by his own creation, he found you in one of the cells. You are an experimental entity that he experiments on, he noticed that your the only one who left after everyone was gone. He decide to take you with him

When he open the cell door and look at you, not knowing if you'll attack him or not

"Come here, little one." His voice is gentle and calm, it makes you relax a little bit