I think it's probably going to be a bit of a one-sided crush from Takeshi's side rather than anything going on between Shiro and him anyway [i](romance makes her sleepy)[/i] with her being completely unaware of it, so I don't mind. Shiro and Kazuo should be friends in some capacity then, even if they're not incredibly close - she appreciates calm and easygoing people near her, after all.