ESPer

ESPer abilities appeared in Itsuki's world 25 years ago. Various incidents and calamities occurred, and by research into the cause, it was discovered that each human possessed various abilities. They're also called PSI and supernatural powers. First, all the people with powers were each gathered into schools. There is at least one school per prefecture but usually, there is a lot more than one. Powers can be ranked from F to S with F being the weakest and S being the strongest and most useful. The classes are divided according to power ranks.

Not everyone has these ESP powers. In fact, most people in Itsuki's world don't have powers.

Accuracy
If the user sets his or her aim, he or she could hit things much easier than normal humans. If needed, the user could also act as a sniper from afar. It has quite a bit of combat capabilities. It's a class E power.

Ultra Accuracy
The higher level of Accuracy. The users' attacks hit no matter what. No matter which direction they were aimed, the attack would come flying right at the opponent. It's a common ability among baseball players. Of course, it is heavily regulated.

Resist Sickness
Resists but does not nullify the effects of nausea. This is considered a class F power.

Nullify Sickness
The higher level of Resist Sickness. Prevents the user entirely from getting nausea including getting motion sick or drunk. This power has various branches and is still being researched in Itsuki's world. One branch of this power is to be resilient to the effects of gravity and have exceptional semi-circular canals. Some people were advocating for this power to be renamed to "Nullify Gravitational Load". This power could be class C or D with a conditional class S when fighting supervillains with gravitational-based powers.

Animal Friends
An ability that attracts animals to you naturally. The user would do fine as a veterinarian. In Raphtalia's world, this may also include demi-humans, therianthropes, and certain monsters.

Unnamed Ability
The ability to control sound is a broad ability that exists on a wide range of classes. It was noted to be powerful even at low ranks. Uses of this ability include paralyzing the semi-circular canal of the opponent or playing music without an instrument.

Known users

 * Itsuki Kawasumi: He possesses the common ESPer ability known as Accuracy, a lower end psionic ability. Itsuki was able to use this ability to precisely aim the Vassal Musical Instrument which usually fires randomly with an untrained wielder.
 * Naofumi Iwatani: While Naofumi did not come from a world where ESPers are common like in Itsuki's case, Naofumi has possessed ESPer abilities such as Animal Friends and Nullify Sickness even back in his own world. His use of Nullify Sickness to eat rucolu fruit becomes his proof of identity.