Shigeru Shigemori

is a second-year at Ishiyama High School. He is the former "Number 3" at his original high school, Hiaburi.

Appearance
Shigemori is a tall, lean-built young man with dark eyes and a large Afro. He also has a thin goatee.

Shigemori wears a dark-colored undershirt beneath a simple, closed shirt. Over this, he wears a dark-colored jacket left open with a dark-and-light square-patterned collar. On the right front of the jacket is a round emblem with a strip patched above. Finally, around his neck is a pair of headphones.

He wears squared glasses with a dark frame.

History
Shigemori formerly attended Hiaburi High School before he enrolled in Ishiyama High School.

Return to Ishiyama High School Arc
Shigemori hears about a very recent confrontation between Yōhei Nasu and Tatsumi Oga, which includes additional members of the Tōhōshinki. He informs Haizawa about the event as well as those involved. Afterward, Shigemori's group of delinquents head over to the area of the situation.

They, along with several other delinquents from Hiaburi, arrive in one of the school building's hallways, where Nasu and Oga are supposedly at. A threesome battle quickly commences in the hallways when Akahoshi intervenes in a skirmish between Nasu and Ichikawa; during which, Akahoshi is seemingly injured, resulting in Shigemori calling out Akahoshi's name out of concern. Luckily, however, he is perfectly fine. The situation quickly comes to a steady conclusion after Nasu leaves with the other Poltergeists. With nothing else to do, all of the delinquents from Hiaburi, including Shigemori, leave with the area.

The following day, sometime in the morning, Shigemori and Akahoshi head to the male restrooms where the former washes his hands. Shigemori brings up the issue regarding Oga and Nasu which he feels concerned about, especially with Nasu. However, he is reassured that Oga will not lose to anyone but Akahoshi. With that said, they then notice an unusually-childish Oga running through the hallways, confusing Shigemori. He asks whether Akahoshi was looking at the delinquent correctly before.

Haizawa, Shigemori, and Akahoshi later return to the campus late at night where they abruptly join several of their peers down at the pool. The trio make a rather flashy arrival with the manipulation of flames, though Shigemori is silent throughout.