Överste Rufidor Ludom, or in English Colonel Rufidor Ludom is a major player in the game. In the first supplement, "Vid Regnbågens Slut" (At the End of the Rainbow) he is introduced as an adventurer and big game hunter. He, and his crew is in Musközonen (The Muskö Zone) hunting giant beetles. He is a middleaged human from the Pyrian city of Pirit. In lated supplements he will become a man who hires the players on as adventurers. Actually, he is their main ally in the epic adventures titled "Undergångens Arvtagare" (Heirs of Doom).

General Samael Kloo is one of the main antagonists in the epic advetures "Undergångens Arvtagare" (Heirs to Doom). He is the general of the rascist private army Vita Kåren (The White Corps) based out of Pirit. He is a ruthless human who despises mutants of all kinds.

One of the major heroes in the "Undergångens Arvtagare" (Heirs to Doom) adventures, Blå Dunster is a vigilante in the city of Pirit. His real name is Marcus Proctor and he works as the imperial prosecutor in Pirit. He is a human who feels that everyone is equal. Blå Dunster in Swedish means Smokescreens or throwing sand even though it is a hard name to translate because word by word it means Blue Vapors.

Kejsare Thorulf Skarprättare (Emperor Thorulf Sharpshooter) is the current Emperor of Pyrisamfundet (Commonwealth of Pyri). He is known to be a fair and benevolent ruler who wants to help his people to achieve more and more for every day. He is of course human.

Frank-Frank Peckwick is the leader of the famous Peckwickklubben (Peckwick Club). It is a club in the Pyrian capital Hindenburg whose members all are mutated animals with a lot of money. Frank-Frank's father Frank Peckwick founded the club and the son took over when the father passed away. Frank-Frank is a mutated swan, always dressed in impecable clothes and taste.

Fridtjuv Berger is the most famous private investigator in Pyri, well the most famous private investigator in whole of Gryningsvärlden (The World of Dawn), which is the name of the campaign world in Mutant:UA. He is a mutated bloodhound who likes to smoke tobacco and solve puzzles...

Julius "Smilet" Piaff (Julius "The Smile/Grin" Piaff) is first introduced in the first supplement "Vid Regnbågens Slut" (At the End of the Rainbow). He is a infamous fence and troublemaker from Hindenburg. He gives the players their first mission in the first supplement and he also makes a comeback later on in the adventures. He is a mutated toad with worn suits and a walking cane. He comes from a rich family, but have been ostracised because he is notoriously bad trouble...

Burros-Burros is my own first character when I played Mutant:UA. He is a grey mutated donkey who loves the mares. He's secretly in love with the beautiful Esmeralda, wife of a Hindenburg merchant. He ias a compulsive gambler, lover and firefighter extraordinaire. He always wears his worn suit, walking cane and firefighter badge.

Fatbur Bengtzon is a mutated beaver from the supplement "Vid Regnbågens Slut" (At the End of the Rainbow). He got psychic powers, and therefore he has been imprisoned by some rascist humans in a big mansion. He is very thankful that the players free him, but just want to go back home and continue to work in the factories and hide his powers so that people won't be afraid of him, and maybe even lynch him.

Larson Pålle (Larson Horsey) is a mutated pig, even if his name might sound like he is a horse. He is a notorious drinker and fighter who ofet is found in jail for fighting. He is fat, strong, emotional and very, very jealous...

Manfred Lund is the only mutant in power in Pyri. He is a personal friend of the Emperor and therefore he is the head of Exploratorkontoret (Chamber of Exploration). He is a mutated pig with wit and humour, but since he have had a sheltered upbringing he is unaware of the rascism that most mutants meet every day.