Aura

Auras are something everyone has. They represent who you are as a person. Skills are also revealed in Auras for those who can see them.
Most people can't control their Auras or are even aware of them, though several types of savants can manipulate their own or others', as well as view them.

Auraseers can read others' Auras.

Sways can use their Auras to manipulate others' Auras which translates into others' emotions and feelings. This is called the Aurawave .

Mnemonics learn to mask their Auras to make them harder to read.