[quote=@HeroicSociopath]
I'll probably mess it up, so I think I'll just skip them if that's alright. Akira can be assumed to be using whatever honoriffics fit the context.
[/quote]

If you are not friends with the individual, Last name [kun if boy or chan if girl] san is rarely used. As it's seems very formal. I'll probably use san for Yue though because it's so formal and I am going with that weird, super respectful kid.

Senpai [class president, a tutor, a student you look up to]

Not much to mess up