Blonde man

Introduction
During a seeming flashback by child!Nimona after she split in two near the end of the story, the unnamed blonde man seemingly found Nimona after she'd been given up by her parents and ordered her taken to one of the facilities he worked at for experimentation.

Appearance
He was a tallish thin man, with pale skin, and short blonde hair. He wore a long-sleeved light-colored shirt, long brown pants, pale boots, and a light-colored cape.

Life
When Nimona was given to some guards for imprisonment by her parents, the blonde man arrived to inquire about her. One of the guards explained that the villagers thought she was possessed, while her parents claimed Nimona was a changeling. The blonde man noted that Nimona needed "a stronger enclosure" than the one she was trapped in. He asked Nimona why she thought her parents gave her up, and then how she killed the raiders. He lied that his organization was going to help her "get better", and that she could see her parents. Then he had her transferred to his facility.

It's unclear what organization he worked for, or what his fate was. But the transfer is how Nimona ended up being caged even more and experimented on, until she either lost control or gained control over her powers so that she could escape.