I have a headcanon now that Gale finds Jan in his hibernation cave and she is this half-grown Manitcore that has COMPLETELY taken it over. After a harrowing day of her trying to eat him he gets sick of it and nearly splits her skull with his staff.
Then she reveals herself to be a terrified adolescent. Gale has to adopt her and he has to teach her language because apparently Manticore don’t have a language, but she’s also really stupid because she doesn’t know or understand anything but eat and sleep.
And she’s sort of the reason Gale has so much patience. Nothing he’s been through since compares.