antimatter is essentially nonexistent. his consciousness and his physical matter are completely separate entities, though by some miracle they manage to sync their desires to work together. his matter can sometimes tweak itself, usually to have different markings, but sometimes it will become distressed and revert to its "true" form; that of a bony, bloody, vile hellhound. antimatter's matter was formed from the remnants of a dying star, and how his consciousness came to be is a mystery,
he tends to be very cynical and deadpan, though he enjoys the company of friends. he's incredibly awkward and shy.
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