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Arcus is a freelance techie to anyone who coughs up the cash- but, generally, to supervillians and other criminals. They're callous, rude, and often insensitive to others' emotions. They're radical, deeply unconventional, and have retreated into as dedicated a self-isolation as you can get while still paying the rent on time.
They despise their parents, but they still made Arcus the person they are today. They were born with Osteoperosis, Muscular Dystrophy, and severe chronic pain, and they were made into a cyborg to try to mitigate the symptoms (and, they were just a convenient human test subject). They instilled in them a radical transhumanism (in their eyes, anything can be solved with a scalpel, silicon, and some junkyard scrap), but also a deep disconect with society and humanity. There's only so normal you can be when your parents are extremist criminals.
These days, they don't really talk to anyone other than people on the internet just as isolated as them, clients, and occasional outings to goth venues and record shops. They're transactional, a bit self-centered, and have very few days where they have the energy to do anything other than break up scrap metal and build deadly weaponry. People are a lot more complicated than cutting-edge technology.