Potestatem Institute

The Potestatem Institute, also known as P.I., is a higher school in Arcon for all kinds of magical creatures, it's mostly attented by fairies, witches and merpeople.

Overview
The P.I. is an ancient school for every magical creature and apparently the only one dedicated to education for multiply species. The students are mostly in ages 18-22. The students reside inside the school. The Chix girls met their new friends here and reside here from Season 3 on. Their headmaster was Mr. Mitch before the conclusion of Season 3 where the school was left without headmaster for almost an entire season until Irice became the new headmistress at the end of Season 4. The students learn how to develop their powers to a higher level, how they are able to control multiply powers, fight evil and learn new spells. The royal students of the school also learn how to rule their realms. Most of the staff are permanent residents of the P.I. and the students only live there during the school year and usually return home during the holidays.

School Building
Unlike the Alfea College, the Potestatem Institute is much higher and less wider. It's split into three parts: One where the fairies and nymphs reside and study, one for the witches and one for the merpeople. However there are some courses which are visited by fairies and witches, e.g: Fabia's the fairy of darkness so she has some courses for evil and dark magic, witches with positive powers most likely also enter courses for fairies.

Fairies and Witches' Wings
The school is built somewhat like a tree, where one part is for fairies and witches.

Underwater part
Assumed to be the only school teaching fairies witches and merpeople, the P.I. also owns an underwater part which is visited by all magical creatures that are only living underwater, mermaids like Ondina and Ashia are able to live above the water and therefore also attend fairies classes. For the underwater part there is a new headmistress who is a mermaid and is in her early 40's. The classes follow the same structure as the ones for fairies and witches just with underwater based courses. The P.I. is located in a lake and has its own ocean gate as well as its own selkie.