>>79672423A is more common in Japan. But both Michiru and Nasa (2/3 of the JPs) are O in gen 1. Iori's is not stated on the wiki and I can't be bothered to watch through her debut right now.
Even so, that's an abnormal skew. Tenma being AB is also even less likely. Even if her lore made her Korean, the probability that she would be AB is substantially less than the probability that two arbitrary Japanese people would be type O.
Anyway, a question to the thread, what blood type would you say your oshi probably is? I think Eimi's probably a B, because she's chaotic and creative. She might also be an A, but she doesn't really exude the sensible side of an A.
