Hmm... I have experience in defying others' wishes for me, but I do not think that would count as destiny.

[And besides his talent at art, Fox wasn't anyone special before the Phantom Thieves swept into his life, so he's doubtful he has any kind of important destiny...]

It's unlikely that I can help you; I apologise. If there are so few energy sources for you here, what would happen if you were to run out of energy completely?