All 3 of them are children of zalgo, Not pure blood children mind you, Those are ones born directly from a woman Interacting with zalgo in the realm he resides in but one's born of zalgos infected media beingconsigned by women who were with child at the time.

Because of this most Zalgoids, Are unable to live in Proper reality. Not being from the unreality realm that zelgo resides in but not really from Earth either. For many years most of zalgos children were forced to cower in caves close enough to his realm to not Choke on the poison atmosphere of our world but far enough away to not be torn apart by his madness.

But luckily for the Zalgoid, Thanks to zalgos deal with Mary, Zalgo is finally able to have proper proxies and by that means he's finally able to nibble away enough at reality that it's beginning to become habitable for his children For long stretches of time without having to wear like weird gas masks.

Sadiya, Being the oldest is the main emissary for her Sisters and few brothers. She's the one who talks to Mary and like gets deals done and stuff. She's the one who makes sure her father's infected tapes are spread so more of her kind can be born And by that more reality chewed away at.

Along with her as emissary is Zahir, Because he is non-threatening and they really need that when dealing with human, Especially Mary who barely trusts as is. He's very human looking like Sadiya and stripes and is very happy to be leave face that is shown as the example of his Siblings.

Stripes on the other hand is lucky enough to be Born with the ability to stay up in the human world for the longest time with a gas mask on of course. Because of that she occasionally helps Jane and her task force out with the killing proxies.

Though 3 like the others of their kind wait in their caves, For the true child to be born. One of pure zalgo that will spell the beginning of the end for reality itself, For once reality has ended they can dance triumphantly upon the Earth and praise their father in the light of the broken sun.