Kilton is a Hylian who is fascinated by monsters and has dedicated his life to studying them. Though his research he was able to create Monster Extract which can be used to create various unique food dishes. He eventually sets up a shop called the Fang and Bone in Skull Lake of the Deep Akkala region where Link first encounters him. Kilton explains that he has been researching monsters and explains that he deals in Monster Parts and will purchase Monster Parts from Link in exchange for the Fang and Bone's special currency called "mon" (represented by a skull icon) which Link can use to purchases various items from Kilton, such as Monster Extract, Spring-Loaded Hammer, various monster Masks which allow Link to temporarily blend in with certain monsters, the Monster Bridle and Monster Saddle for his horse, and an Armor set based on Dark Link.
After encountering Kilton in Skull Lake, Kilton will use his hot-air balloon to tour the land of Hyrule and the Fang and Bone will appear on the outskirts of all major villages at night from 8:00 p.m. to 4:00 a.m.
Additionally Kilton plays a key role in the side quest "A Shady Customer", in which a soldier named Hoz who defends East Akkala Stable asks Link to investigate Kilton as he considers him to be a shady character, when in reality Kilton is just an eccentric monster researcher. Using the Camera Rune, Link can must take Kilton's picture and show it to Hoz, receiving a Silver Rupee as a reward.
Kilton is apparently known to certain people in Hyrule as Chabi one of the travelers Link can rescue from monsters while traveling throughout Hyrule has been searching for Kilton's shop.