Absorption and Release

The Four-Eyed Nomu carries Absorption and Release, rendered in Japanese as 吸収・放出 and romanized Kyūshū Hōshutsu. It is an Emitter Quirk of close-range classification, arriving in Chapter 55 of the manga and Episode 30 of the anime.

Counterattack is its whole purpose. Instead of blocking or evading, the wielder draws an enemy's Emitter-type assault into itself and sends that same energy back down the line at its source.

The power responds only to Emitter attacks. It takes them in and discharges them again toward whoever launched them, with nothing added or refined along the way, so what returns is essentially the opponent's own strike turned around.

Intake and protection, however, are separate matters. Pulling an attack in does nothing to cancel what that attack does to the body doing the pulling, meaning the user eats the harm along with the energy. Endeavor caught this at once during the fight at Hosu: his fire was coming back at him, yet the Nomu stood there visibly burned by it, and on that basis he judged the Quirk a weak one.

The Four-Eyed Nomu is the only known wielder. It put the ability to work against Endeavor in the Hosu Incident, taking in the flames of his Hellflame Quirk and hurling them back at the Pro Hero.

Similar powers turn up elsewhere in the series. Stock lets its user swallow an attack and let it loose again afterward, while Flect Turn and Tomura Shigaraki each hold a Reflect Quirk covering comparable ground, Tomura's being the closest match in function to this one.