Traxigor

Sylvira Savikas's lab partner and fellow temporarily caretaker of Lulu. Traxigor was once a human archmage but at some point a polymorph experiment transformed him into an otter and he decided he liked it better that way. Luckily, when you're a wizard, it doesn't cost a bunch of money to have all your clothes re-tailored to fit you now that you're an otter; you just shrink them.

Traxigor's suggestions for destroying pretty much any kind of evil artifact is to throw it into the River Styx. He also was responsible for plane shifting the party to Avernus after they helped him find his magical tuning fork which was the spell component, but panicked and jetted out of there via time stop and fly when confronted with actual devils in actual Hell. Some people just aren't made for field work.