The ultimate demon lord, Astral Trinity, shows up in the form of Arata with a grotesque new appearance. Hijiri appears as well, and the others discover that she is a high-level mage whose goal is to kill Arata and destroy the school.
You keep becoming more and more 
of a demon lord, don't you?
Du wirst immer mehr zu einem
wahren Teufel, nicht wahr?
Te conviertes cada vez más en 
todo un rey demonio, ¿sabías?
Te conviertes cada vez más en 
todo un Rey Demonio, ¿sabes?
Arata, tu te rapproches de plus en plus
du maître magicien.
Arata-san, continui a sembrare 
sempre più un Signore dei Demoni, eh?
Você continua virando mais e mais
 um lorde demônio, não é?