What's that one senpai's name? The one who calls tsubasa great demon king

Its Arisuga Wa Ryou. He told tsubasa a fake name so she doesn't know that he's the "girl" she texts to as her diary.

*Its not a spoiler, I'm just guessing from context clues*

then do you know what student council president's name is?

Arisugawa Ren; I think it might be either one since they might be related since they have the same last name. Thats why Tsubasa was like is it him in the chap he heard her name

thank you <3

np!