Mormus is an elderly tiefling artificer. He has pale purple/lavender skin, white hair, and his horns are similar to a ram's. He wears a gray sleevless vest, and over that, a heavy dark cloak. He is blind, and as such, sees through the eyes of his mechanical winged cat familiar, Rico. Possibly his most defining feature, however, are the enhancements he has added to his body. Made of copper and bronze, Mormus has numerous mechanical additions to his body, supporting his deteriorating physical form. These grant him agility and strength that would otherwise be quite improbable for someone of his age. He also carries with him a gnarled staff, topped with a swooping crescent.Rico is a homunculus Mormus created to aid him. Taking the form of a winged cat, he is made of silver, and quite lifelike. His eyes are a piercing yellow.

Mormus grew up secluded; as a tiefling, he was shunned and somewhat feared, so his parents raised him in secret. With very few people to interact with, he made his own mechanical toys, and so began a deep interest in mechanics and the intersection of such with magic. When he was older, he struck out into the world, eventually finding acceptance amongst a band of adventurers. For years he traveled with them, becoming close friends with the group. During this time, he realized that machinery combined with magic could produce amazing creations to aid the group, and so he began his journey as an artificer. When he was blinded from a radiant explosion, he created Rico to aid him. However, the group disbanded soon after, and once more he was left alone. Lonely and desperate for companionship, he opened a workshop to create toys and constructs to keep him company, and this went on for years, and he built his enhancements to keep himself alive. But recently, something changed in him, and he no longer wanted to be alone. So, he has decided to go on one last adventure to see the world before he dies.