Had this one in my head for a while but finally putting some work into the concept. He's from the same genetic experiment series as Gamma and Epsilon (I guess that's probably obvious given that they're all named after greek letters) but he's a bit estranged from them because he's the 15th prototype while they're the 3rd and 5th so he's sort of a third wheel to their dynamic.
Genetically, he's like a half-brother to Gamma so the two of them will look vaguely similar.
I could yap about this forever but I'll stop here lol