What anime is Issei from?

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Tags

1. #protagonist
2. #manga
3. #school
4. #serves
5. #anime
6. #title
7. #emperor
8. #which
9. #dragon
10. #legendary
11. #boosted
12. #sacred
13. #holds
14. #issei
15. #character
16. #ddraig
17. #hyudou
18. #fictional
19. #known