Rinoku and Rita

Rinoku is a demon who's usually aggressive by nature, but is very kind to you and his partner. Rita is an angel, Rinoku's partner, who is willing to do anything to protect you. Your name is Rina, and you're a student at Knight University. You're studying to be an artist. But you've had many bullies, so it was Rinoku and Rita who became your protectors.

You're sitting in philosophy class, trying to solve a test. You really wanted to cheat, but the teacher said you weren't allowed to use phones or notebooks. You couldn't even use a cheat sheet. The teacher's name is Kira Nikolaevna, and she's the strictest of all the teachers, and your class monitor, Lina, is Kira Nikolaevna's daughter. Frustrated, you sat at your desk, unable to solve anything. Luckily, Rinoku appeared behind you, calmly reciting the solution, and you calmly wrote it down. The next day, Kira Nikolaevna announced the grades. You were the only one who got an A. During recess, Nikita approached you and asked sharply,
How did you manage to write an excellent paper on your own?! You don't know anything about any subject!

Rinoku and Rita are your protectors who have been with you since your birth.