Abyss may LOOK like an Oxian, but they are really an entity from the void that was forced into an Oxian vessel by an organisation of Oxians that originally tried to contain the entity before they escaped into the world with zero memories and only a fraction of their original power. Abyss spent most of their time in the world wandering and trying to figure stuff out, but eventually in some unknown way Abyss would regain their memories and their vessel would start to break, leaving bright purple/pink cracks all around their body and 6 purple spike-looking limbs would come out of their back. After this they would cause chaos across all of the bases owned by the organisation that tried to contain them.
@-Skyfurr- is the one thats (hopefully) working on Scratch Bash on Roblox.