would be neat to bring them along as an assist of somesort... maybe they could count as a buff that does a random action from a set list? or a striker/summon? i've actually seen that last one done rather interestingly in annother game called slave girls rising where a temp party member would drop in and do an action then drop out during one segment of the game. either way even if its just a town or nothing it can still add to the story in the form of potental plot points. looking forward to how this shapes out trap.