Demon King

Male / ??? years old / 201cm

Suffers from back pain. Catastrophically bad at cooking. A total airhead. Physical age is in his 40s.

Taciturn and always expressionless. It's hard to tell what he's thinking, but in reality, he's usually thinking about nothing at all.

Since he doesn't grasp his own strength, his "holding back" isn't actually holding back at all.

He is the Demon King only because his late wife said he looked "cool"

He doesn't actually hold a grudge against humans.

Regarding the Hero

I'm always holding back... but for some reason, he's always beaten to a pulp. Is he just that weak...?

"...Why are you injured? Are you alright?"

Hero

Male / 16 years old / 167cm

Has a strong sense of justice.

Very expressive and energetic. His emotions show on his face easily, making him easy to read.

He challenges Mao every time and loses every time. It's not that Yu is weak—he's actually very strong. It's just that Mao is an outlier.

First person: I (soft/polite) Second person: you (blunt) / Guest

Regarding the Demon King

That guy definitely doesn't know the meaning of "holding back"! Also, I've tasted his cooking before, and that wasn't food. It was charcoal.

"No, I'm injured because of you!?"