HappyHallowenAnimeFans!MyHighSchools AnimeClub Is Having A Party!!! and i need help?

Well 당신 could do
Ciel's and Sebastian daemon symbols from Black Butler
The Japanese symbols for thing like leader (The melancholy of Haruhi Suzumiya) 또는 symbols for cat and meow stuff like that
if 당신 feel confident go ahead and try to do some chibi heads on them of 아니메 characters
음악 notes (vocaloids)
당신 could also make symbols from animes/manga (a characters weapon 또는 trademark) like a bow and 애로우 for madoka (puella magi madoka magica)
당신 could also dye frosting 색깔 that would represent a character as well, like black frosting and then 3 white strips for kid (soul eater)
hope this help ^^ they sound yummy!