Your team has already chosen roles for themselves! Dad is the LEADER of the group, Buddy is the SECOND IN COMMAND (and possibly the fighter, it pipes up.), Primus is the SCOUT and NAVIGATOR, and Marnet as their MUSCLE and GUARD.
Seaspray, Crunk and Whipp talk to their gods, and relay that their roles will be DEFENSE, HEALER, and SNIPER respectively.
Seaspray's ability lets them create shells on any surface, not unlike Marnet's ability with the magic wand. Wretch puts down a simple plastic cube for them to demonstrate on, and within seconds, shells have formed on the surface. They murmur that they're not sure if it'll work on living creatures, and that they're kind of scared to try.
Crunk reports that her ability is about average in strength- jelly heals pretty decently, and has a solid regen rate. She isn't going to be pulling any miracle cures without losing an entire limb, but it'll grow back. She seems relaxed about the whole affair.
Whipp keeps it simple. She shoots bullets, each bullet takes a little bit of health. Easy.