Board Thread:General Discussion/@comment-25860806-20150221032302/@comment-26906851-20150819171128

Obvious:

Pine Tree: Dipper Pines

Shooting Star: Mabel Pines

Question Mark: Soos Ramirez

Fez Sign: Stanley Pines

Kind of Obvious:

Sticthed Heart: Robbie Valentino

Starred Eye: Gideon Gleeful

Not That Obvious:

Ice Bag: Wendy Corduroy

Tall Llama: Pacifica Northwest

Not Really Sure:

Mysterious Glasses: Stanford Pines

Author's Hand: Fiddleford Mcgucket

(Those last two could be swapped or switched out, I don't know what they could be. Stanford (A.K.A. the author could be either one of those).