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.