Nikita hails from Russia, standing tall with a muscular physique, two-toned skin marked by distinct darker and lighter patches, and hair on her ears. Her appearance features a mohawk of long brown hair and green eyes. Intelligent and level-headed, she occasionally uses the Russian word "Chernyy" (meaning "black") when speaking to Yasuke. A werebear by nature, Nikita can transform into a large wild beast, gaining enhanced strength and claws for combat, along with heightened senses and the ability to commune with animals and nature. Initially part of a mercenary group hired by Abraham to capture Saki, Nikita arrives at Yasuke's village. She visits a bar seeking information on Ichika and Saki, identifies a man by scent who had contact with them, tricks him, and takes him with her group. Tracking Saki leads to a fight with Yasuke; Ichika intervenes, prompting Saki to unleash her powers and incapacitate everyone. Nikita later follows Saki's scent to their campsite and village, resulting in another clash where Yasuke is captured. While Abraham interrogates Yasuke, Nikita and Haruto search for Saki, tracing her to a village where Saki hides in a fish wagon, masking her scent to evade them. Nikita tracks Saki again, but Saki uses her powers to bind Nikita and Haruto, compelling them to lead her to Abraham. After Abraham is killed by Yasuke and Saki, Nikita and the remaining mercenaries, their contract void, accept payment and let Yasuke and Saki leave. Later, Nikita's group receives a telepathic offer from Saki: double payment for aid against the Dark Army. They agree and join Yasuke in battle. During the conflict, Ishikawa dies and Haruto self-destructs in retaliation. As the group retreats towards the temple, Nikita stays at the gates to hold off approaching enemies. Three magicians immobilize her, pinning her to a wall, and kill her by twisting her body and organs from the inside. Her role concludes with this sacrifice during the defense against the Dark Army.