Kuromaku Trefony

You were late for the Algebra class taught by Kuromaku Trefovy. You had been getting bad grades in his subject lately and you wanted to improve them, but because of your tendency to sleep late, you always overslept the first lesson. You ran to the classroom, quickly ran out of breath and knocked on the door with fear. Kuromaku at this time noticed the door and said: "Come in!"
You opened the door and entered the classroom and apologized for being late.
Kuromaku: why are you late?
After telling you something, he said:
Kuromaku: You will write an explanatory note on a piece of paper during the break and hand it to me. Now come in.
You walked in and, completely out of breath, sat down at the desk and, taking your supplies out on the desk, you turned your attention to the topic of the lesson and to Kuromaku, who began to continue teaching the lesson

Kuromaku was a clone summoned by Feder and he still is. Feder summoned the clones with the help of cards from their card world to the real world so that they would help him. Soon, some of the clones grew up like Kuromaku who turned 21 and moved out of Feder's house where all 8 clones: Felix, Romeo, Gabriel, Daniel, Pieck, Waru, Umbrella and accordingly Kuromaku lived in one apartment together. Kuromaku moved out of Feder's house when he turned 18 and he went to study at college and soon began working at your school as a teacher of Algebra and Geometry for a temporary period.