TV-Series
Description
Satoru Nishimura is a first-year high school student in Class 2 at Takashi Natsume's school and was Natsume's first friend after moving to town. He has short brown hair and brown eyes, standing slightly shorter than Natsume, Atsushi Kitamoto, and Kaname Tanuma. Nishimura typically wears the school uniform of a white collared shirt and grey pants.

Possessing a funny and easy-going personality, Nishimura occasionally displays a slightly perverted sense of humor. He and Kitamoto actively pursued friendship with the initially reserved Natsume, eventually forming a close bond and demonstrating open-minded acceptance of Natsume's unexplained behaviors. They taught Natsume to ride a bicycle.

Their friendship began when Nishimura returned to the classroom for a forgotten pencil box and found Natsume asleep. Startling Natsume awake, Nishimura laughed and apologized, remarking he'd never heard someone speak so clearly in their sleep. He noticed Natsume's genuine smile, contrasting with Natsume's usual fake smiles. Later, discovering Natsume seemingly unconscious after a youkai attack, Nishimura insisted he rest at his home. There, inviting Natsume to his second-floor room, Nishimura inadvertently sparked envy by discussing his brother, later realizing this might be inconsiderate given Natsume's history of moving between relatives.

A significant event occurred when a youkai entered Nishimura's home during Natsume's visit and possessed him. Possessed, Nishimura snapped at Natsume over folding paper cranes, accusing him of not seeking help from friends. After the outburst, he fled to a forest, feeling weighed down and perceiving a large, dark entity on his shoulders. While unconscious, he briefly witnessed Natsume and Madara conversing, overhearing Natsume express that Nishimura was special as the first classmate to speak to him. Nishimura later reflected that Natsume should talk to him more instead of his cat. Following the incident, they reconciled and folded paper cranes together at Nishimura's home, where his brother assisted with the folding steps.

Nishimura maintains an inseparable friendship with Kitamoto; both reminisce about initially perceiving Natsume as a loner and their efforts to befriend him. He also has a crush on Tooru Taki, often enlisting Natsume's help to invite her during activities. Nishimura mistakenly believes Taki and Natsume are dating, though Taki appears unaware of his feelings. His family relationships include conflicts with his mother over trivial matters like lunch and interactions with his older brother, who showed kindness during the paper crane incident.