Masegaki Primary School is famous for its brats, and the name says so outright. Its pupils pair unusually strong Quirks with unusually little respect for adults, which is exactly why Gang Orca marched his remedial hero students in front of them.
The school's name is a joke at its own expense. Read as masegaki, it means precocious brat, and the syllable gaki on its own covers brat or troublesome child. The campus appears in Chapter 164 and Episode 79.
Its children are sharply attuned to social dynamics and adult hypocrisy, and their Quirks are both powerful and unusually well controlled for their age. That combination makes them fearless. Their teacher, Komari Ikoma, admits she has almost no authority over the class and apologizes constantly on its behalf.
Kugo Sakamata, the Pro Hero Gang Orca, hands the class to his remedial course students as an assignment, and Ikoma gratefully entrusts them with it. The children immediately challenge the hero students to a fight, fully expecting to win. Their ringleader is an unnamed blond boy wearing a permanent smirk, convinced that unexpected power puts him and his classmates above adults, and annoyed by grown-ups who always assume they know better.
The stalemate breaks through play rather than discipline. The remedial students use their Quirks to build the kids a play area, and the class comes around completely. Afterward the children treat the hero students as heroes, saving special admiration for Katsuki Bakugo and Shoto Todoroki.
That affection outlasts the war. Once the fighting is behind them, the school builds a yearly event around Shoto, the Summer Cool-Off Five Weenies Festival. He attends regularly and freezes castles, slides, and other structures for the students to enjoy, much as he did during the remedial training that first won them over.
Komari Ikoma teaches the class and spends most of her screen time apologizing for it. The students' unnamed blond leader speaks for the group. Kohei Horikoshi has said he first modeled the boy on a non-Japanese child he met years earlier.
The rest of the class goes unnamed, though several display Quirks strong enough to flatter a much older student.

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Masegaki Primary School is the elementary school featured in My Hero Academia, first appearing in Chapter 164 and Episode 79. Its students pair unusually strong Quirks with little respect for adults, prompting Pro Hero Gang Orca to send his remedial course students there as a training assignment.
Gang Orca handed the unruly class to his remedial course students as a training assignment, and their teacher Komari Ikoma gratefully accepted the help since she had almost no authority over the children.
After the class challenged them to a fight, the remedial hero students built a play area with their Quirks instead of disciplining the kids, winning the class over completely and earning special admiration for Katsuki Bakugo and Shoto Todoroki.
The Summer Cool-Off Five Weenies Festival is an annual event Masegaki Primary School holds after the war, where Shoto Todoroki freezes castles, slides, and other structures for the students to enjoy.
Masegaki is a joke at the school's own expense; read together it means precocious brat, and gaki alone means brat or troublesome child, fitting its famously unruly students.
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