Emitter

Emitter (発動 Hatsudō) type quirks are those that allow the user to generate and possibly control certain things, or alter existing things around them in certain ways. This type is the broadest category with the most amount of users compared to Psi, Transformation, and Mutation types. They generally are active, not passive, and require activation. There is currently significant scientific debate on what makes an Emitter type an Emitter.

Accumulation
Accumulation-type quirk's are powers that, in order to function properly, require the user accumulate something ahead of time, such as power, energy, mass, or a particular resource. Some such quirks are One For All, Rewind, and Fat Absorption.

Alteration
These quirks cause the users body to take on a temporary alteration using an outside resource; there is a debate on whether this is a pure Emitter type quirk or a fusion between a Transformation class quirk and an Emitter type quirk. The difference between an Alternation type Emitter quirk and a Transformation quirk is that the quirk requires the user to take in an outside resource for the quirk to activate; in this sense, it is very similar to Accumulation type quirks, which require the accumulation of a particular resource to activate. Examples are Sugar Rush, which requires the user to ingest sugar, and IQ, which requires the user to drink tea.