Betsy Braddock wasn’t born Japanese. No, that didn’t happen until she switched bodies with Kwannon, a Japanese assassin. Braddock’s original body was compromised by the Legacy Virus, and Kwannon died. The six-armed mutant Spiral the cause of the mind switch to start with, and whenever Spiral is involved, things never end the way they’re supposed to.
Kimiyo Hoshi was an astronomer who happened to be observing a subtle battle between the Monitor and Anti-Monitor. The Monitor activated her as part of his plan to keep the positive universe ahead. Bright, sexy and a doctor? Sign us up for positive sexual healing.
Keniuchio Harada is the illegitimate son of a Japanese crime boss. He learned he was a mutant and then applied his skills to further his crime aspirations. You can’t say he didn’t put them to good use as a criminal because he later managed to turn over a new leaf and stay on the straight and narrow. Well, until Blindspot forced him to forget that he was a superhero.
In her human life, Naiad was a protestor in Alaska that was set on fire and killed. After that, she became a powerful elemental force in the DC universe. Not too much can be said about someone who’s basically a part of nature itself. She makes waves wherever she wants. Sea what we did there?
Shiro Yashida comes from the same clan as the Silver Samurai, but is significantly less criminally inclined. He’s neutral, though the fact that he can generate plasma from his body and was listed as one of the “Legendary Twelve” mutants (as an elemental) is important enough that his presence is necessary in quite a few fights. Most of the time, however, he chooses not to get involved in the X-Men’s affairs despite being a member.