Rin isn’t quite popular, but is known pretty well since everyone calls him "the sleepyhead", though he doesn’t get bullied for it. Instead, people don’t really care, neither do the teachers at this rate since he sleeps too much you can’t stop him. Its like a drug, ish. Other than his sleepy behaviour, he’s actually good looking, and thats what makes him a little popular/well known. Also incredibly smart which is also another reason teachers don’t complain when he sleeps in class