Carl and Mongo are members of the Royal Court of Princess Donut whose relationship develops from wary handling into mutual protection and battlefield trust. Mongo is formally Princess Donut's bonded pet and Royal Steed, not Carl's. Carl nevertheless helps choose, restrain, train, equip, protect, and command the Mongoliensis from the moment the party finds him on the Second Floor. Mongo, in turn, repeatedly defends Donut and fights beside Carl, making his survival inseparable from the survival of the group.
The bond is less demonstrative than the one between Donut and Mongo. Donut calls herself Mongo's mother, manages his pet interface, and rides him. Carl occupies a different role: he assesses danger, devises ways to keep Mongo alive, and decides when the dinosaur's aggression is an advantage or a liability. Their trust is expressed through action. Carl can order Mongo away from a hazard or toward a target, while Mongo places himself between danger and the party even when he is badly injured.
Choosing a dangerous pet
Carl and Donut find Mongo after defeating Ralph in the kobold fighting-pit complex late on the Second Floor. The dungeon presents a row of captive creatures from which they may select a pet. Carl initially favors a white-tagged brindle grub, reasoning from the danger posed by its adult form that it may be the safer and more useful choice. Donut instead fixes on a seven-inch-tall, pink-feathered Mongoliensis whose map marker is still hostile.
Carl understands that letting the creature out will result in an immediate attack, but he yields to Donut's choice before the cages close. He unlocks the cage, catches the charging Mongoliensis in both hands, and holds him while Donut offers pet biscuits. The creature bites Donut on the nose and continues snapping at both crawlers. His description warns that Mongoliensis cannot truly be tamed, may attack any visible enemy, and will fight to the death. Carl's first response is therefore not affection but alarm: the party has selected a fragile, aggressive animal predisposed to get himself killed.
That danger gives Carl an active part in Mongo's bonding. A normal safe-room transition would cause an unbonded dungeon creature to disappear, so Carl and Donut spend the remainder of the floor removing Mongo's hostility and establishing him as a party member. Carl notices a recap-show description of the species as a pack hunter and turns it into a training method. He releases Mongo against a lone brindle grub and has Donut demonstrate how to kill it. Fighting alongside Donut changes Mongo's marker, allowing the system to recognize him as her pet and give him the title Royal Steed.
The arrangement also forces Carl to think about Mongo's welfare before the dinosaur is useful in combat. Mongo is initially carried in a gerbil cage because he attacks anyone who holds him. When Odette explains that a magical pet carrier can safely store a bonded animal, Carl immediately treats buying one as a priority, regardless of cost. He also learns from Odette that the harmless-looking chick is a velociraptor and that a surviving adult will become a powerful fighter. Carl's dread at the revelation does not alter the decision already made: Mongo is now part of the party, and keeping him alive has become one of Carl's responsibilities.
Growth on the Third Floor
Mongo's first sustained combat experience changes Carl's assessment of him. On the Third Floor, Carl participates in Donut's obedience training by throwing sticks and watching whether Mongo waits for the command to fetch. Mongo grows rapidly with each level, and Carl observes that the dungeon is enlarging him beyond the size of a real Earth velociraptor toward a more cinematic form. Carl treats that growth as both an asset and a planning problem. Mongo becomes strong enough to finish wounded enemies, but his excitement can ruin stealth or pull the party into an encounter.
Mongo also proves useful as a scout. When he stops and looks upward in the ruins, Carl follows his gaze and discovers a skull-headed lemur concealed on a roof. The creature's map marker appears only after Carl sees it, demonstrating that Mongo's senses can reveal an ambush the interface does not. In other fights, Carl and Mongo attack the same target at close range, including a clown monster that Donut knocks down with magic missiles. These early engagements establish a simple division of labor: Donut directs or mounts Mongo, Carl controls the shape of the fight, and Mongo exploits openings with claws and teeth.
The limits of that control become clear when a city elf uses the Meat Hooks spell. The spell produces a lure that compels nearby carnivorous pets to leave their owners. Mongo charges into an alley, and Carl immediately runs after him while ordering Donut not to rush ahead. After killing the elf, the party learns that Mongo's apparent disobedience was magical compulsion. Carl keeps the recovered scroll because the same mechanic may later be useful, but the incident teaches him that enemies can weaponize Mongo's instincts against the party.
Reciprocal protection
The defining early event in Carl and Mongo's relationship occurs after a carnival attack separates the party. Carl awakens without knowing where Donut is. Mongo's screech and orange map marker give him his first confirmation that another member of the group is still alive. When Carl reaches them, he finds Donut unconscious behind a makeshift barricade and Mongo standing in the breach. The dinosaur has continued defending her while surrounded by street-urchin mobs; both he and Donut are covered in long spikes, and Mongo's health is nearly exhausted.
Carl first heals Donut, whose health has already fallen to zero and been restored only by her Cockroach ability. He then tries another healing scroll on Mongo, but ordinary crawler healing does not work on a pet. Unable to use a potion either, Carl identifies the real cause of the attack. The street urchins are scavengers attracted to the wood and metal in the barricade, and they fight Mongo only because he refuses to let them pass. Carl dismantles his own defense piece by piece and distracts the mobs with scrap until they lose interest. He then gets Mongo back to safety for pet-specific treatment.
The scene establishes that protection flows in both directions. Mongo does not preserve himself when Donut is threatened, and Carl does not regard the injured dinosaur as replaceable equipment. He speaks to Mongo directly, changes the environment instead of forcing him to continue fighting, and accepts responsibility for the unintended consequence of his barricade. This response becomes the pattern for later floors: Carl will use Mongo aggressively, but he also studies effects that can poison, charm, infect, immobilize, or separate him from Donut.
Command, restraint, and responsibility
By the Fourth Floor, Mongo has reached level fifteen and his full physical size, approximately pony height and thirteen feet from beak to tail. His new strength and Earthquake leap attack make him a serious combatant. The enchanted saddle strengthens both Donut's spellcasting and Mongo's body while she rides, but Carl immediately objects to the vulnerability created by placing Donut on the back of a melee fighter. His concern is not that Mongo is untrustworthy; it is that Mongo's role encourages him to enter the most dangerous part of a battle with Donut attached.
Carl accordingly alternates between deploying Mongo and ordering him into the carrier. He keeps Mongo back when stealth, negotiation, environmental poison, or precise timing matters. Before a tense meeting with Hekla's group, he tells Donut not to release Mongo because an argument could become a fight and nobody knows how the pet rules will behave in that safe room. During the Iron Tangle campaign, he places Mongo in the middle of guarded transports, sends him against exposed enemies, and orders Donut to keep him clear of hazards such as electrified rails. These decisions treat Mongo as a powerful party member whose lack of judgment must be supplied by the crawlers around him.
The Fifth Floor makes that responsibility explicit. During a battle in the glass-and-sand castle, Donut panics when Mongo is injured and loses focus on the wider fight. Afterward, Carl tells her that they will protect Mongo as well as they can, but that she cannot stop functioning every time he is hurt. The warning is not a dismissal of Mongo's importance. Carl frames the problem as a collective survival obligation: if Donut ceases fighting, she endangers Mongo along with everyone else.
Mongo also begins responding to Carl's direct combat orders without Donut translating them into a pet command. When Maggie My, in her Scree form, ambushes Carl and tears open his neck, Mongo grabs her before Carl loses consciousness. Carl orders him to chew, and Mongo kills the attacker. The moment shows how far the relationship has moved from their first meeting, when Carl could control the tiny dinosaur only by holding him with both hands. Mongo's aggression is still the same trait Carl feared, but discipline and shared experience have made that aggression usable in defense of the party.
The Hunting Grounds and the Masquerade
On the Sixth Floor, Carl's plans increasingly depend on Mongo's mobility and capacity for violence. Donut rides him alongside Carl's vehicles, and her Twinkle Toes spell lets Mongo outrun the chariot. Carl still orders him confined when the party needs to move invisibly or when infection and poison threaten nonimmune creatures. He also includes Mongo's health in plans that have no safe solution. When obtaining a potion requires Mongo's blood, Carl schedules the collection, healing, and later charm-potion pickup around the party's route rather than treating injury to the pet as an acceptable shortcut.
Mongo's encounter with the wild Mongoliensis Kiwi adds a second dinosaur to Carl's tactical calculations. Carl gives Mongo and Kiwi time to become accustomed to each other and uses their paired speed in attacks against hunters. At the Butcher's Masquerade, the hidden dinosaurs enter the hunters' ballroom as part of the larger assault. Mongo and Kiwi bring down Vrah and tear off her limbs. Carl then sends Kiwi back toward the stage and orders Mongo to finish Vrah. Mongo obeys, completing Carl's personal revenge against one of the floor's most dangerous hunters.
The order is one of the harshest examples of Carl's authority over Mongo. It is also highly specific: Carl separates the two dinosaurs' tasks, protects the wider operation by returning Kiwi to position, and entrusts the final kill to Mongo. The pet who once charged every visible enemy now functions inside a complex, multi-group plan involving crawlers, NPC allies, stage mechanics, and two connected ballrooms.
Later-floor partnership
On the Eighth Floor, Carl and Mongo continue fighting as close-range partners even though the floor's card system complicates ordinary combat. In repeated keyholder encounters, Carl and Mongo rush deckmasters before they can play their cards. During the turkey-farm battle, Mongo is rendered unconscious among hostile creatures. Carl runs into the flock, drags the heavy dinosaur by the tail, then lifts him over his shoulder when obstacles block the retreat. He kicks attacking turkeys away and uses explosives to keep them from pecking Mongo while waiting for him to recover. The rescue reverses their Third Floor positions: Carl is now the one holding the line over an incapacitated Mongo.
By the Ninth Floor, Mongo operates within the much larger Princess Posse war effort. Carl no longer supervises every movement, and Donut frequently commands on another front, but he still tracks Mongo's condition as family rather than as a unit statistic. When Mongo's health falls dangerously low during the fighting around Shanty Town, Carl reassures Donut that Mongo survived and reports that Rend helped save him. Near the end of Faction Wars, Mongo independently bites through the artificial heart and lungs associated with Warlord Epitome Tagg; the system awards the kill to him and the resulting assets to the Princess Posse.
These later battles do not turn Mongo into a conventional soldier. He remains excitable, food-driven, and liable to pursue whatever has caught his attention. Carl's trust is therefore practical rather than absolute. He relies on Mongo's loyalty and ferocity while continuing to use the carrier, direct commands, terrain, and Donut's pet abilities to control the risks. Mongo's place in Carl's life rests on that combination: he is dangerous enough to alter a battle, vulnerable enough to require protection, and loved enough that Carl consistently plans for both facts at once.
Nature of the bond
Carl never replaces Donut as Mongo's owner or primary attachment. Instead, he becomes the human member of a three-way family structure. Donut supplies affection, identity, and direct pet management; Carl supplies much of the tactical judgment and physical rescue work; Mongo protects them both. Their domestic routines reinforce the arrangement. Mongo sleeps at the base of Donut's cat tree and later on Carl's legs, shares the party's private space, and receives equipment, food, and medical planning from the same pool of resources used for the crawlers.
Carl's language toward Mongo shifts accordingly. Early complaints focus on the likelihood that the creature will kill himself or get the group killed. Later commands assume that Mongo understands the immediate goal: stay away from the tracks, guard Donut, enter the carrier, attack, stop, or finish a target. Carl pets him, praises him, corrects him, and risks himself to retrieve him. The result is not a simple owner-and-pet relationship. It is a protective partnership built around Donut, strengthened by repeated rescues, and tested whenever the dungeon turns affection into a tactical weakness.