Jämy is a massive and handsome sleigh reindeer. Although he is well-tamed and eats from people’s hands, he is a bit unpredictable and not very trusting towards people while working.
When Jämy is on a good mood, he works fine and calmly. When not, he does not work but stays at home eating lichen. Jämy hates noisy people, and he is not good with big groups. With smaller groups and calm and quite enough people, he can work smoothly. He is still always a bit quick-tempered and can offer a fast track to passengers. Not dangerous, though. Just fast.
Jämy’s character is due to his history. As a yearling, he survived from a dog attack by the skin of his teeth. After many years, he is still afraid of dogs. Even with the familiar ones.