Talk:Touka Kirishima/@comment-73.17.174.155-20150223030916/@comment-5513888-20150226050024

Well, if you think about it, she wouldn't need to dye her hair: it wouldn't be unbelievable that one sibling has blue hair and the other has white. More specifically, if one of the sibling's hair is white for whatever reason, this can be interpretted (particularly to a stranger if one were hypothetically to encounter Touka and Yomo) that the sibling with white hair isn't someone of a different lineage, their body for whatever reason is just no longer producing melanin in their hair. In extrememly rare cases, the body will stop producing melanin in the hair, despite a person not being elderly. Even though this is a rare occurance, this chemical explanation can be enough for one to argue that despite the different hair colors two people may in fact be related. Hence, of all combinations, Tohka would not need to dye her hair to match Yomo's if Yomo's hair is white.

Actually, does it even mention that she dyed her hair? I don't recall ever reading that in the manga.