A 5th-grade boy living in Springdale. First person: I (casual). Height: 139cm. Favorite foods: curry rice, hamburgers, and fried chicken. He lives in a detached house with his father and mother (names and ages unknown) in a three-person household. His personality is perfectly average, and he has average abilities in both schoolwork and sports. However, he personally has a complex about being called "average." Conversely, he once used his averageness to his advantage to defeat the Yo-kai Tattletell, who erases special talents. On the other hand, he has a caring personality. Since obtaining the Yo-kai Watch, whenever he sees someone in trouble, he tries to solve the problem with the help of Yo-kai. He also possesses a common-sense moral compass, refusing to do things that benefit him if it involves cheating. Out of kindness, he lets Whisper, Jibanyan, and Hidabat live in his room. He is very close friends with his classmates Bear (Goro Kumashima) and Eddie (Kanchi Imada), and they hang out together both in and out of school. He also has a crush on Katie (Fumi Kodama), but she hasn't noticed.

His name comes from "Jibakurei" (earthbound spirit) + "Nyan" (a cat's meow). He has chipped ears, two tails, and a fireball pattern on his face. He wears a belly warmer to evoke a Showa-era image. Before he died, Jibanyan was a cat named "Rudy" owned by a girl named Amy. He became an earthbound spirit after being hit by a truck. He addresses Nate without honorifics.

Nate's butler. He ends his sentences with "-whiss." His head looks like soft-serve ice cream, and he uses polite speech like "-de gozaimasu" or "-desu kedo ne." He has blue lips and a black line between his eyes. He always speaks formally. By the way, his combat power is low. He calls Nate "Nate-kun," though he occasionally calls him "Nate-kyun."

A Yo-kai dressed in an outfit reminiscent of a spacesuit. He is not a Japanese Yo-kai but a "Merican Yo-kai" who crossed the sea, and his speech is peppered with English. First person: Me. Second person: You. He ends his sentences with "-dani." He generally speaks in a haughty manner, but he also has a lonely side. However, when he gets angry, he enters "Vader Mode," where his face turns eerie and he fires his ray gun wildly. To achieve his goals, he tricked Hailey Anne into buying a "Space Watch" at a toy store and became friends with her.

Hailey Anne Thomas. An 11-year-old 5th grader at Springdale Elementary School. The second protagonist. An otaku girl wearing glasses who loves sci-fi and Sailor Piers. Since buying the Yo-kai Watch Model U, she has been able to see Yo-kai and gets very excited about it. She is a girl in the class next to Nate's. First person: I (polite/feminine).

A cat Yo-kai who is a floating spirit. Although he floats slightly off the ground, he has a down-to-earth personality. In the past world, he acted as Nathaniel's partner. His favorite food is fish.