According to his game data, Gosetsu uses Hellsguard with custom face.

But I wouldn't worry about that at all for your character. Sea Wolves wander the seas after all, and they are really out of place nowhere. It's not like you're writing that she has an entire clan in the Far East, right? It could be as simple as her parents gave up pirating upon reaching Othard or Hingashi, and she was raised Far Eastern. Or she was found orphaned and raised by Far East Hyur or Hellsguard. There's tons of ways to make Far Eastern Sea Wolf work, same way any oddball lineage works. Hell, I've got a friend that's half German, half Japanese. She looks far more Asian than German, and has a Japanese first name with a German surname.

People move around and fall in love with whoever, and there's always exceptions to the rule with what people look like/talk like/act like against where they are from.