She is voiced by Kate Higgins also voiced Gatomon and her digivolutions in Digimon Adventure tri..
Gatomon's Digi-Egg fell and became separated from the rest of the Digimon. She later hatched into Nyaromon, and constantly waited for Kari she was programmed to bond with. When she later digivolved into Salamon, she searched for that person instead of passively waiting.
During Gatomon's flashback Nyaromon is shown sitting in a tree, waiting for someone she is programmed to bond with. This someone would be Kari, as Gatomon would later find.
Digimon Adventure tri.
Due to the reboot, Nyaromon and the other DigiDestined Digimon are reverted to their In-Training forms with their memories erased.
Kari becomes engulfed in corrupted digital code which causes a weakened Nyaromon to digivolve into Ophanimon Falldown Mode, who creates a dark portal.
Omnimon Merciful Mode, destroys Ordinemon once and for all but also deleting Meicoomon in the process.