Whitehorn is a white monoblos and Drill's pet. She has white skin, black and white spikes and horns, and green eyes.
While in the Monster Hunter universe, the team comes across a fighting arena created by hunters. They infiltrate the arena by putting their own rescued beasts into the fights. They all only pretend to fight each other to give the others time to rescue the trapped beasts. Drill rescues Whitehorn and she's grateful.
Whitehorn is a kind and gentle soul, who is very caring and protective of her master. She is a logical minded creature who thinks before she leaps. While in battle, she is fierce and brave. She is unendingly patient and caring, never losing her temper or her cool, and guiding others in the course of helping them, as shown by not losing her cool when the team was complaining while trying to find water in the desert after escaping the battle arena.
Whitehorn has thick skin and three horns.
Trivia:
Whitehorn gets her name from her having three white horns.
Drill mistakes Whitehorn as a triceratops.