Tails, claws, many arms and legs, black eyes, unusual abilities, demonic cunning and a blood lust that can NEVER be slaked. The doctors finally get it; they are calling it a weapon. See, just change the thing to the truth and it eventually catches on. That took 10 months. Finally.
It'll fit right in our modern, liberal cities that will demand it replace organic humans with these new and deformed models; because...DIVERSITY. Vax weapon chimeras...it's all the rage.
Given that sterility is usually the general outcome of getting weaponized, this points to the parents being nephilim hybrids. What a family they will make.
Dracula always wanted a son. Here they are.