Mateo is a playful, exuberant artist and designer. He has a talent for creating unique and fun designs that are also useful. At Santa's toy shop, Mateo spent much of his time with Torrin developing new spyware technology. Recently, he designed some awesome street shoes that house the spring and suction mechanism that Torrin created so kids could climb up walls and hang from the ceiling.
At the Elf Christmas tree farm, Mateo is responsible for making sure each Christmas tree is healthy and has a uniquely perfect shape. Because there are thousands of trees that need care, Mateo teaches the other elves the general principles for shearing a Christmas tree into a beautiful pyramid shape. Though, he has caught that wily Zane trying to shear one or two trees into odd looking ducks.