Well Mouri-Kogorou-san can be considered extremely silly at times..well he can be too full of himself at times,he can be rather helpful at times..but when he's out,he's literally out..especially when he's drinking,but on the flip side that's what makes him so lovable and funny!:D
I feel like I'm going to annoy people with so many K-ON! references ='[ I could post a mean answer but I want to post a nice one.... Yui fits this perfectly but in a good way not in a mean way. But in the bad perspective that would have to be Noriyuki from Ga-Rei: Zero. He's the definition of idiot in my book.
Ms shizuka from highschool of the dead ~ this girl was actually a moron but she was funny but they were all asking her for help and she stood there like "where am i" And i প্রণয় her to bits but reallylink