Board Thread:General Discussion/@comment-26303790-20150909012141/@comment-27159736-20150917060250

@Jinghey

Pine Tree: Dipper

Shooting Star: Mabel

Question Mark: Soos

Stitch Heart: Robbie

Star (looks like the star of David): Gideon

Glasses: The Author

Crescent Symbol: Stan

Ice Bag: Commonly believed that it's Wendy

Llama/Alpacca: Commonly believed its Pacifica

Hand: Unknown but believed to be the Journal

This might not be accurate but there is a Cipher Wheel Page on the wikia.