Symbols

Mabel: 13

Dipper: 13

Gideon: 14

Pacifica: 12

Melody: 35

Robbie: 16

Wendy: 16

Ford: 63

Lee: 63

Fiddleford: 62

Other Characters

Candy: 12

Greyson: 13 (they're still in the same grade though because Candy will turn 13 in a couple months)

Amanda: 14

Soos: 36