Thread:Harostar/@comment-28815154-20160714184201

So should we edit Hikari's page and write that Hikari has O blood type? Because Arata's blood type is A and yet Ayato and Touka have O blood type, and after all their blood type (Touka and Ayato) had to be inherited from some parent and I'm pretty sure blood type doesn't skip a Generation like hair or eye color.

But then again this is just speculation, please give your thoughts and correct me if I am wrong. 