TDR headcanons
So we have Model 0 and Viral Code being apart from other viruses because they're former cleansing programs, is it possible that they had their original names? Couldn't tell anything about Model 0, but what if Code is abbreviation? He could be named as Cleansing Operational Destributive Emulator aka C.O.D.E.
I also headcanon that was Model 0 was somewhat an unsuccessful project to serve robots, because he was referred as first betrayal of Origin.
There's also a chance that viruses aren't dead nor deleted after we battle them, I think they're smart enough to backup themselves (except for Paradox 0.5 he's a bit silly)
The "Alphus's friends"'s(or how they are called in tdr) abilities may represent their purposes in real world: Tool - medical robot, Defect - hacker, processing robot made for fixing systems, Alphus - war robot??, Derelict - a war robot too, maybe made for more hidden and precise attacks.
maybe I'll make another part of headcanons idk