Raiuko Kalpa

Raiuko is the teacher for 2nd and 3rd year Melee Combat at Crossroads. Its hinted she acts as security at the school with other unnamed people.

Unlike Brie, Rai does not bother hiding her abilities. She is not related in any way to another character with the same name, Aphrodite Kalpa.

Raiuko has a talking necklace named Tammy, who Rai uses to store the data she has. In the event she cannot do that, she is able to memorize her data without any problems.

Synopsis
Raiuko is one of the original staff members at Crossroads High. She completed her formal Police Academy training before her arrival in her homeworld of Bago Langit. She had lived a former life as an Osakan native in Japan before she was brought to said homeworld as a half demon in order to grant her unlimited potential. Thanks to the one who brought her back, she was given the tools to create the Change style gems. She possesses the first one ever created, the Change Bolt gem.

Upon noticing the potential of Brie and Tournesol as students, she handed them the powers of the Change Flame and Change River gems. However at around this same time, one of the two remaining gems were stolen.

Rai is still trying to find out who stole one of the gems, because the power of the Change gems is their ability to use Change Styles. Once the chosen vassal is found, the gem vanishes and grants them the powers of that gem only if they are worthy of the element specified.

Right now, she is one of the police officers on duty at the school. However, The Black Lotuses have more authority than she does so she is not able to arrest anyone without the Head's permission. In addition, she can only get Search Warrants with his permission. She is however, able to investigate suspicious activity at the school and also can break up fights that are not ranked with force if necessary.

Complete List of Abilities
You can find it here.

For those Curious On How Change Styles Work