It's a good fortune thing. They're supposed to keep bad luck and stuff like that away.

[Leon probably needs it, considering he was stalked by two Stahnbots recently... This is just a quieter way of Kashuu saying he's concerned and wants Leon to be safe in the future!! Maybe he's trying to actually be a little more tactful or subtle for once...]

D'you even have pockets, though? What kinda outfit is this if it has no pockets?

[WHERE ARE THE SECRET POCKETS, LEON.]