Much of Asid's knowledge and training come from experience he had as a teenager specializing in engineering and hands-on type work in highschool and the colleges he attended when not on duty after joining the military. He prefers not to talk about much of that time, however.
It is known, however, that he attended Valley Forge Military Academy after high school. It is also known that his high school years were filled with a troubled home life and a troubled school life. His known hobbies are reading, target shooting, video games, and working on engines. It is known that after an abortive relationship (he was later a person of interest during an investigation in his former fiance's disappearance), he withdrew from the world of dating for roughly a decade before entering a relationship with now-Senior Chief Petty Officer Audie Fitch, another member of Stargate Command, which eventually led to their marriage. In 2022, he became the first human to ever deliberately detonate an Isa Bomb, which has led to a severe amount of dislike and hatred towards him, though many stand by his decision. He has, since this event, recieved angry letters from families of the deceased, and plenty of hatemail.
In late 2023 he suffered a mild aneurysm, and slipped into a coma that lasted until nearly the end of the year. When he awoke, he had no memories of the previous twelve years. After awaking from his coma, the added stress of him and recent missions caused his then-pregnant wife to suffer a miscarriage.
He holds the patents to several items, including the P.K. Magnetic Accelerator Weapon Series and other various items. Numerous scars on his arms, shoulders, chest, and legs suggest prolonged torture over the course of several months.
Asid Mjolnir was executed for treason in 2026 in an alternate timeline discovered by the Helios Expedition.
Asid Mjolnir was maimed in a mortar attack on Stargate Command. Later in that timeline, he was the last remaining member of The Initiative left on Earth, where he deployed an Isa Bomb to destroy the Enigma portal in the Sol System, destroying both the Portal and Earth. He remarried in 2045 to Christene Etearna, who would later give birth to Estragon Mjolnir and several other children. Asid, in 2079, remained around the Alpha Site to wait for the returning SG teams. After their arrival, he led them to Sanctuary in order to buy them time to rebuild their pod and return home.
Asid Mjolnir, at times, displays what may be defined as psychopathic tendencies in his lack of remorse at death or pain. However, despite these tendencies, he is able to form close friendships and relationships, even being able to show sufficient love and affection to get married. However, despite this, when he is directly responsible for a death of someone under his command, he is able to show some emotion.
Beyond this, Asid tends to be a withdrawn and antisocial person, except as forced into by his position. At times he will join in group discussions or parties, but often with clear hesitation and discomfort.