Once Zeta was part of a heavily plural Strange-infested gestalt- entity called Hydra with members such as Hydra/Beta, Hydra/Gamma, etc. Hydra isn't unknown for performing experiments, and after it acquired some data from System on his biology and his links to System's universe, Prime, a Beta got severed from Hydra to avoid contamination by Prime and then directly hooked up to that universe just to gather data. This Beta was 'fixed', and now her strain of Strangevirus no longer infects others. Cast adrift, she joined Prime and System's family. Still adrift, she accepted an offer from Altis to reconfigure her, and be reborn. Zeta, as she is now known after her rebirth, shares many of Altis's abilities as well as retaining some of her old traits as Beta (including the charisma, which she seems to have regained). She's linked into Prime and somewhat bound to System's family.
Onto her frame drapes flatteringly a neat white satin dress, slender and small, accentuating the slight curves she posses. White gloves also fill in the effect, while something almost like also white shoes or boots cap the terminating of her digitgrade legs in soft featureless pads
Zeta is my sister. Her alpha priorities constitute an alpha priority of my own. I will do whatever is necessary to insure her welfare. - System