Jake: ring (on left hand)
Melody: earrings
Hector: bracelet on right wrist
Ross: necklace
Nancy: bracelet on left wrist
Hope: earrings
Scott: ring on (right hand)
Barry: choker on his neck
Looks alike in element form
Jake ring dark symbol 🌑(left hand)
Melody headphone (🎤🎼🎹🎶 note)
Hector: fire symbol 🐉🔥(breathing fire dragon)
Ross: green leaf 🍃
Nancy: lightning symbol⚡
Hope: tornadoes🌪
Scott: water symbol 💧
Barry: light symbol 💡

(Melody earrings looks like)