I have three main ones that come to mind, Cydian and her two firstborns.
Cydian looks very young despite her actual age. Someone would believe she’s in her early thirties. All she wants is a family (a possibility taken from her when she was infected) and she sees herself going to Omega as going to a place to give people a real life instead of barely scraping by. She truly believes she’s helping people by making them Nocturni and treating them like her family. She also understands that she shouldn’t create more Nocturni than she can feed, so she’s very picky with who she turns. She also never infects real children, preferring to let them live through their innocent years before she turns them as adults.
Desdemonus is one of her first borns. He’s a big guy even for a Nocturni and many think he’s just the dumb brute. He’s actually very intelligent and very loyal to Cydian. He has a good number of body modifications, from piercings on his face to a tattoo design that covers his right arm, chest, and part of his back. It’s design is of a Hierarchy ship burning and crashing from space and it was initially a means of remembering the violent way his parents died when he was a child. When Cydian found him, he was a smuggler who had the bad enough luck to find himself stuck on the colony when it was attacked. He looks older than Cydian.
Her other first born is Asmodeus. He is very unstable and has been from the beginning. He could be considered Cydian’s ‘trouble child’ but she loves him just as much as she does Desdemonus. Asmodeus is lanky for his build and bears a long scare across his throat. When the colony was attacked, he was imprisoned for assault and suspicion of committing more dangerous crimes and, when the Nocturni came to him to kill him, he fought tooth and nail like a wild animal. He was left for dead when Cydian found him and gave him a chance to live. He of course took it and has been loyal to her ever since. He looks younger than Cydian.
Despite the tiffs between Desdemonus and Asmodeus, they are both fiercely loyal to Cydian. They would die for her and truly treat her like a mother figure while she treats them like her sons.
Thanks for the ask! It was really fun!