This is a Japanese game, and we have to have one overtly Japanese character. So we get Zekuu. (There’s also Higan, but Zekuu really emphasizes his Japanese influences.)
And now that you’re done laughing about his name-
Okay, I’ll give you a little more to finish laughing.
Zekuu: Lady Hero. I’m a swordsman from the Kingdom of Izuruno, Zekuu. It is a pleasure to make your acquaintance.
Heroine: I look forward to working together with you.
Z: ...that a person like you would become the legendary Hero...
Z: No, it’s nothing. I’m certain there must be a reason you were chosen. First, I would have you show me your abilities.
So Zekuu is the successor to a noble family with a long lineage, so he’s probably got stiffness inbred in him. But he’s so stoic he gets called the Icy Samurai. He’s doing this Road of Glory thing to basically bring further honor to the family name.
I’m a sucker for the Japanese-inspired fantasy designs but I don’t like these stoic types normally. Except... He’s voiced by Ono Kensho, who I also knew nothing about, but whose wiki page has been very informative. Like that he’s the official Dan Radcliffe dub voice.
...we’re gonna go on a journey with Blue Ninja Harry Potter!
Otome Yusha character page