Kaylee: She is a mechanic and an engineer who loves strawberries, so a wrench, hammer, grease can, strawberry, or toolbox ornament would suit her.

Jayne: He is a mercenary, so a gun, a holster, a jayne hat, boots, or something like that would be good.

Book: He is a preacher. Well, books. Or prayer bead garlands, or a cigar (he likes cigars)

Inara: She is a Companion, so anything fancy or Indian or Eastern would be good. A lipstick, a necklace, a lute ( I think she plays)

Wash: He is a pilot and a goof. Hawaiian shirts and toy dinosaurs!

River: She is childlike and ethereal and strange. A rag doll, or anything weird... ooo a mind-bent spoon

Zoe: She is hardcore. A gun, A mustache (fan joke)

Mal: He is the captain. A gun, boots, a spaceship

Simon: A doctor's stethoscope (sp?), glasses, etc

General: Christmas balls that look like planets, western-themed stuff like little tin cups, or leather saddles, ornaments in red, yellow, and orange (the Serenity logo's colors), and Chinese-themed ornaments.