@Mioumiou
Spoiler!
Just to clarify things, piano is not an SS class guide, he just has an ability that amplifies the guiding compability with espers, thats why they all liked him. But on the other hand, Hyoseop is in fact an SS class guide, but the problem is that because of his past and that sh*** esper, he didnt get reevaluted one, since he presented as a guide for the first time, which is why nobody knows that hes an SS class guide(not even himself 😅