Boomerang

Boomerang, written in Japanese as Būmeran, belongs to Itejiro Toteki of Ketsubutsu Academy. It sits in the Emitter category and reaches long range, which makes it one of the few thrown-weapon powers with genuine reach in the series.

Readers met it in Chapter 104, and it reached the anime in Episode 54. The wiki files it under Ketsubutsu Students Quirks.

The power appears to give its owner authority over the flight path of anything he throws. Rather than travelling in a straight line, a projectile under this influence can curve and hunt down whatever it was aimed at.

There is a visible tell. Whenever Itejiro engages the ability, both his hands and every object he has claimed take on a purple shine.

Guided objects are not invincible, even hardened ones with the density of concrete. Anything thick and viscous will foul a projectile's course, and Mina Ashido's Acid proved perfectly capable of knocking one off its line.

His named Ultimate Move is Trajectory: Crescent Moon, in which hardened projectiles are hurled beneath the ground and curve toward the target from below, keeping their approach out of sight the whole way.

Itejiro Toteki is the only person shown with Boomerang. He is a Ketsubutsu Academy student, and the Quirk gives his name a certain inevitability given that Toteki reads as a throwing reference.

Mina Ashido stands as the notable counter, since her Acid Quirk demonstrated how a viscous liquid unravels the ability's guided arcs.