I know the OP hasn't been updated in a while, but I'm going to go ahead and drop these here for anyone who needs them.
1.) Any character from Shinryaku! Ika Musume!
except the title character. Most of them
wear basic yellow t-shirts and black shorts with flip-flops for the duration of the show. One
even sports a pink coat with only a bikini under it!
, from Sword Art Online's Aincrad version is literally just a white dress.
3.) Jack Frost
from Rise of the Guardians is popular, probably because he wears a blue hoodie, worn brown pants: stuff you can find at Wal-Mart. Idf you don't care about the details, this can be very easy. (If you do
...good luck, kid.)