Say what...?!Try calling by his name without adding any honorifics.I'm sure it'll make him happy.I can't...Let me tell you a way to please Diluc.Why not?I can't do iiiit!
Calling such a cool individual like Diluc-san without honorifics is a big nononononon-I saw an unexpected and interesting reaction.But He Is So CoolLumine.I...Calm down, Lumine!!Intensely-interested Lumine-chan