Cool, go for it. =)
As for good luck charms, I don't actually wear anything toku-related around (though if I could get away with it, I'd leave my henshin belt on...) I wear my Legion Flight Ring pretty much everywhere, although if I -had- some small toku-related jewelry that I could wear without feeling silly I'd probably go for it.
Shougo's necklace sounds uber-cool, though.