Espers are really no different than humans; they look like any normal human and in general behave like any normal human. However, there are a few key differences. The max life expectancy of espers ranges from forty-five to fifty. They naturally have a knack for mathematics and are extremely intelligent in general, this is because their abilities rely on the subconscious and conscious calculations. They also have a mysterious energy source they call Focus that is generated naturally by all espers.