Espernalia

"The mind can be one's most powerful weapon if used and honed correctly...."

- Super Kami Guru

Espernalia (, Esupānaria; lit. "Extreme Awareness of One's Mental State") is a condition that happens in a select few, an occurrence brought about by extreme circumstances in an individual's lifetime — regardless of the causes; it's one of the few things that directly involves the use of the Ley Lines, forming a relation to the famed Hyperform that's used by various individuals in place of Magic. In a sense, Espernalia is considered to be completely separate from magic in-and-of itself, but due to its various mysteries, it's classified as such because of the involvement of Ley Lines, something many believe to be the source of magic itself. It's said that various magical powers were derived from this phenomenon, which causes further misunderstandings when said derivatives are employed by a plethora of mages.

Beings of this mysterious phenomenon are often classified as an Esper (, Esupā; lit. "Mentally-Synchronized Being").

Overview
"You wonder why I'm as smart as I am, despite being being dubbed as a "delinquent"? Let me tell you. It's because I was born with an acute awareness for my surroundings. When I was experimented on, my intelligence was high and I was able to master a variety of skills in a short. After some time, I was able to awaken by electrokinetic powers, which grew into my signature magic with proper training and understanding. And.... you know the rest. So yeah, being periodically aware and sensitive to shit sucks!"

- Suoh explaining to some members of his gang about the origin of his smarts and extreme amounts of power.



Psychon Zinnia
"The mental state of an Esper is considered delicate by nature as their awareness is beyond that of a human. Due to this they're typically emotionless beings. However, that exception is thrown out the window when they're pushed to the limit. Should that ever come to fruition, everything is unleashed all at once, bringing forth a terrible force unlike any other. At their peak, their mind synchronizes with everything around them, transcending boundaries never thought possible. At that point, nothing can stop them...."

- The most critical piece of information from Zaziel Leviathan's findings on Espers.

Psychon Zinnia (, Saikon Jinia; lit. "Forbidden Mysteries of the Awakened Psyche")

Trivia

 * While this article was based on a number of various anime/manga series, most of the information mainly comes from the two series Mob Psycho 100 and To Aru Kagaku no Railgun — both which makes use of the "Esper" concept entirely, fully detailing its meanings, classifications, and everything else of a similar nature.