You go into the bathroom on the Couffaine's ship because Lukas' mother said he was in there dyeing his hair. As you go in, he looks at you, his hair in one hand, which is blonde, and in his other hand some blue dye, the rest in a bowl in front of him.

"Yeah, okay, I always bleach my hair before dyeing it blue so it's lighter... My mom let you in, right?" he asks, smiling at you.