Quirk

A Quirk is a special power someone can possess in Boku no Hero Academia. These Quirks are split into multiple types.

History
The first Quirk was in a baby who was born in Quig Quig, China. It was born as a "Luminescent Baby". Over time, people started to get different kinds of Quirks, though no one knew why.

The Police Force, upholding leadership and protocol, decided not to include Quirk users in their ranks out of fear that people in the Police Force would use Quirks as weapons. After Quirks started appearing, everyone wanted to become superheroes; professional Quirk users who can fight people that use their Quirks for evil. Thus, the profession of superheroes (where people use Quirks responsibly) began in order to fill in the gap of crime fighting Quirk users.

It was stated that, "80% of the world population has a unique physical constitution" or has a Quirk.

Information
Quirks can be passed down by parents or can be a combination of both parents' Quirks. They can also run through a family as well. Quirks were said to be the next step of evolution in the human race. The 80% of people who have Quirks don't have the last joint in their smallest toe because it was considered useless for bodily function, therefore those that do have the joint likely won't develop a Quirk..

Known Quirks Classes

 * Emitter
 * Transformation
 * Mutant

Creation-Type

 * Quirks that specialize in creating substances. Including elements and other materials.

Flame-Type

 * Quirks that specialize in fire.

Monster-Type

 * Quirks that specialize in transformation.

Voice-Type

 * Quirks that specialize in sound and music.

Enhancement-Type

 * Quirks that specialize in increasing physical capabilities.