Ultimus is one of the Guardians of the Universe. He is the Android Guardian of Life. He protects all life with out hesitation for his own safety.
When the Elder Guardians created him and his allies he was chosen to protect life for his compassion towards all living things. But when one of his allies turned on them, he had no choice but to go against him, but proved to be no match. Only when using his power along with his teammates, who he had felt become more like family, did they over come the traitor, but he was not defeated.