The yetis are very curious and playful. They seem to fit the "gentle giant" personality, even though they can be a bit rough at times (eg. using Bartleby as an impromptu bowling ball in "Wishing Heart Hollow"). They have a very large appetite and can ingest entire baskets of food at once. When communicating with others, they almost always say "hi!" According to the Rainbow King, they hibernate during the winter and wake up in the spring. Upon waking from their hibernation, they are very hungry for nummle berries.
The yetis are large in size. They have periwinkle fur and light blue eyebrows. They have no hair on their hands and feet and seem to have most of their hair on their torso and head.