Are you going to wait for Finn to get attacked by a monster to ask him out? That might be a bad time.
You can adapt Finn if you think you can write him well.
That first part reminds me of Pirates of the Caribbean: "I don't think now's the best time!" LOL
And thanks! I don't know for sure if I'll use any characters from the RP beyond the ones I created myself, but it's nice to have the option :)