Donut's bonded velociraptor pet, growing pony-sized and lethal, whose kills buff the whole party.
Mongo, Princess Donut's bonded Male Mongoliensis, screeches into The Iron Tangle already dog-sized and rapidly growing. Once Donut takes the Hooligan class, his kills feed the party's Mascot buff, making him a strategic asset as well as a wrecking ball — he decapitates Jikininki ghouls, swallows Cave Mudge Bonkers whole, and proves immune to the Red Cornets' nausea attack, forcing the team to lead every fight with him. By mid-floor he hits full size, roughly pony-height and thirteen feet from beak to tail, gains an Earthquake jump attack, and reluctantly submits to a fan-gifted saddle so Donut can learn to ride him.
A vividly feathered velociraptor with red-and-blue plumage and a long tail, growing to pony height (~13 feet nose to tail-tip); enormous killing claws on each foot, a sharp beak, and a hot temper.
The party's melee heavy and mount; his damage powers Donut's Mascot buff.
Also appears in books you've already read — spoiler-safe to their endings: