Thank you for playing and your time writing this feedback!!
At first, we wanted something to make the player feel attached to some adventurers and that's why we wanted to make a game about a guild and its members! But, we were running out of time and we opted to do a pool of adventurers that would come and go, like mercenaries...? I kinda goes in the same direction you mentioned, somehow make adventurers persistent. That's definitely the direction we wanted to go!