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Spirited Competitor: In both of his endings, he refuses to accept Karnov's fortune and helps the man back to his feet, only concerned with having a good fight which would determine the stronger of the two.
Running Gag: After being scouted by the Chinese mafia due to his abilities, Mizoguchi eventually grows homesick and attempts to leave the gang during each tournament he competes in, all of which (with the exception of KOF MI:RA) inevitably end in failure.
Shotoclone: Ayup. Compare his Tiger Bazooka to the Hadouken (with the Gotsui Tiger Bazooka functioning as the Shinkuu Hadouken), his Koryusai and Tsutensai to the Shoryuken, and his Renzoku Keri to the Tatsumaki Senpuukyaku (although it's closer functionally to Dan's Dankuukyaku or Sean's Tornado).
The Casanova/The Charmer: In spite of the less... attractive facets of his personality, Jean seems to have a bit of a soft spot for women. He shows more than a passing interest in Feilin while commending her skills and also appears to do a bit of flirting with Yungmie (or at least trying to pass on a bit of advice) given his win quote against her. In Dynamite, he also decides to pull his punches with Ryoko.
Jump Physics: As a counterbalance to his damaging throws (most infamously, the dreaded Double German), Marstorius has a very low jump (the lowest in the game), making it hard for him to effectively deal with and counter the numerous projectiles most of the remaining fighters have access to.
Amazonian Beauty: She has the whole "Chun-Li thunder thighs" thing going on. Her arms aren't anything to scoff at either.
Badass Adorable: Has her moments, more so in Suiko Enbu: Fuunsaiki than in the series proper, but of note is the fact that her defeat portrait is downright pitiable: Feilin looks disappointed by her loss, Ryoko scowls, Yungmie is on the verge of tears.
Expy: She's the Korean equivalent of Chun-Li, albeit to varying extents. Her design has a few traits in common with Chun-Li's, such as the tights and eyeshadow. She's also a Kick Chick like Chun-Li, possessing a similarly muscular physique and a Hyakuretsu Kyaku-esque special. She decides to investigate the mysterious disappearance of her parents (similar to Chun-Li's Disappeared Dad) and has a vendetta against the Big Bad because of it (i.e. Chun-Li vs. Bison); however, she drops it upon learning that Karnov wasn't responsible. Yungmie even replicates Chun-Li's "Yatta!", although she doesn't do the corresponding win pose until her stint as a Guest Fighter in Suiko Enbu: Fuunsaiki.