From the anime series "Welcome to Demon School! Iruma-Kun", these are my versions of the rank badges worn by the students and other demons of the world. A complete set includes all ranks:
1- Aelf
2 - Bet
3 - Gimel
4 - Dalet
5 - He
6 - Waw
7 - Zayin
8 - Het
9 - Tet
10 - Yodh

Badges are printed in PLA, finished by me. If you'd prefer to print your own, please visit my Digital - Printable items!