Quirk Science

Quirks are the superpowers of the modern age, with census estimates putting the worldwide percentage at around 80% Quirked people and 20% Non-Quirked/Quirkless people.

They break or bend all pre-quirk era science, and are often powerful to boot. Such wide relevance on the world stage has led country's and their scientists around the world to make a study of Quirks and how they work on a grand scale.

From methods for the classification of Quirks, to the mechanics of how they fit into established physical frameworks, people have studied Quirks in a scientific method, and a summery of this is what is shared below.

Quirk Classification methods

When studying Quirks and how they work and interact with the world and their users, it is useful to have terminology and systems for classifying them. Below is an incomplete overview of the most popular and well used systems, in Japan and around the world.

_Name_ 's model

_Name_ 's model is based on an early attempt to group quirks based on their behaviour, ___, which has since been improved upon to get the modern system. It divides all quirks into three main categories, and further subcategories, based on first their general behaviour, through two main questions: Does it require activation or is it always on? How does it affect the body.

Flaws

While a fundamental part of many governmental systems and data gathering pursuits, it is deeply flawed. Some Quirks, and many more recently, don't fit neatly into any one of these categories. In addition, many people with classically emitter Quirks also have developed minor mutations in addition to their main power, often acting as a sort of "Secondary Quirk".

In a few notable cases, people with Quirks that would be classed as Complex Mutations have gained Emitter or Transform 'Secondary" Quirks, maintaining a full mutation while also having a fitting other ability. An example would be Himiko Toga's Blood Mimic, which turns her into a vampire(Fangs, weakness to sunlight/sunburn, pale skin) and lets her take on the form of those people who's blood she has recently drank.

The rise in inherited mutations is also important to note, as they don't seem to count as Quirks anymore, becoming part of the genetic code of the child without a Quirk to give them such things.

Such flaws do not rule out the systems usefulness, but always remember that it is not always the full picture.

Emitter

Emitter Quirks are Quirks that the users has voluntary control over, and affect things outside of their body. They can range from __ to ___ and are the most diverse type of Quirk.

A specific emitter Quirk can fall under multiple subcategories at once, a fact unique to emitters (and Quirks that have emitter components)

Elemental

Elemental Quirks are Quirks that control the elements, normally the classical ones

Mental

Mental Quirks are Quirks that affect the mind or perception. They are limited by ___ principle, that a quirk can't meaningfully decode another person's memories, or brain functions in general.

• Hitoshi Shinso's Brainwash/Neural Command
• One for All

Stockpile

Stockpile, also called Accumulation Quirks are quirks that require the user to gather, collect or otherwise store energy, of any form.

• Eri's Rewind, storing time passing in her horn
• Rikiya Yotsubashi | Re-destro's Stress, storing the stress, anger and frustration the user feels
• Tsukiko Shigaraki's All for One, storing Quirk Energy and Quirks inside itself
• Taishiro Toyomitsu | Fat Gum 's Fat Absorption
• Momo Yaoyorozu 's Creation, storing caloric energy

Meta

Meta Quirks are Quirks that are able to affect other Quirks. Allowing the mimicking, suppression, and movement of other quirks is what these Quirks do.
It is supposed that many individuals that are presumed Quirkless are in fact holders of self directed Meta Quirks that are unable to act on their own. For example, a Quirk that makes your own quirk stronger can't do anything without its user holding two quirks, which is utterly impossible, except for the rare intervention of other meta quirks.

• Izuku Midoria and others' One for All
• Tsukiko Shigaraki's All for One
• Aizawa Shota's Erasure
• Monoma netos's Copy
• Kei Chisaki's Overhaul
• 's New Order

Transformation

Transformation Quirks are Quirks that the user has control over, and affect their own body.

Mutant

Mutant Quirks, also called Hetero-Morphs, are Quirks that the user does not control, instead acting passively and affecting their user's body.

The ___ power ranking system

Points

The ___ ranking system for Quirks works by assigning/figuring out a value from zero to five, sometimes allowing half marks( or counting to ten instead) , based on jurisdiction and use case, for four different categories of Quirk power. You then sum them to get a total. That total will be in a range between 1 and 20 (in most cases, except when you have a overfilled value) and where it is determines the class of quirk, from 1 to 5 (or 6).
The ___ power level of a Quirk can change over time. Both after training it, to do more things or be easier to use for longer, or after a Quirk Evolution, which almost always brings you up a class

Classes

The classes go from least to most powerful. The average Quirked person is around a mid 2, with relatively few high class Quirks around. It goes on a roughly exponential scale, a class two is twice as powerful as a class 1, and a class 5 sixteen times as powerful as one.

Quirk Mechanics

Allowed breaks of physical laws

Quirk Energy Fields (QEFs)

Quirk awakenings and evolutions

Principles and exceptions