Because the character, what he has, is really interesting. He is sometimes childish, but sometimes he is the hero or a little he is the bad guy. The most main characters are clever, because they are all good students, but Rin can't learn a lot. He always sleep in the class. Moreover he is really good-looking and his flames and tail are really cute. x3
he is too honest to himself...very cute...also 4 main char(i don't like most of the main char)he really is the best...he don't act like he is sacred or never make mistake, unlike most of the main char in other animes...so i love him...
perhaps what is right is not like the sun, but more like the stars.
there are infinite number of stars in the heavens and they cancel out eachother's light.
narsus - Arslan senki