Pine Tree= Pacifica

Snowflake= Dipper

Llama= Mabel

Falling Star= Gideon

Vulture= Robbie

Crossbones= Wendy

Specs= Ford

Witch's Hat= ???

Broken Heart= ???

Rotary Dial= ???

While the identities of those last three symbols were never revealed by the creator, I have theories about who belongs to them, which I'll talk about later on.