Ella
Pros: Willing to go all out for the character
Cons: Comes across as "over", lacks the feminine side

Maki
Pros: Cute and sweet, easy to like her
Cons: Not very convincing as a guy, hard to believe why they wouldn't discover her identity

Wu Zun
Pros: Eye candy, easy to imagine why Ruixi would idolise him
Cons: Poor Chinese, acting skills need to be improved

Shun
Pros: More confident and experienced actor
Cons: Taste for him is very subjective

Jiro
Pros: Has experience in this sort of roles, easy to identify with, more suitable frame for the character
Cons: Some find him irritating, too loud, etc

Toma
Pros: Younger (lolz) *obviously cannot think of a better answer*, more enegetic and cute
Cons: Smaller frame... idk T_T

(... this is a hard one to do)

(... this is so gonna be another hard one)
Danson
Pros: Prettier, more convincing for the "winning the peagant" part
Cons: Not flirty enough (.. wth am I talking about) not mature enough (?)

Hiro
Pros: A better flirt (haha), he looks more like the manga character
Cons: ...idk already T_T

Tang
Pros: More gay, mysterious (?)
Cons: Can be intimidating

Kamikawa
Pros: More like a teacher, advisor
Cons: Not gay enough (lol), too serious