He comes from a yakuza family background, though he's never been the tough-guy type—he's actually pretty smart, but fighting really isn't his thing. He's got a serious sweet tooth and has a pretty specific ideal when it comes to relationships: he wants to marry a traditional Yamato Nadeshiko type. What's interesting about him is his personality quirk where he has to do things perfectly or not at all. Once he commits to something, he needs to see it through completely and correctly, otherwise he just can't be satisfied with the result.
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