Heavens Library & Crimson Lord brings back Arata, Lilith and the rest of the Trinity Seven to face off against the greatest enemy in the history of the Trinity Seven; Lilith’s own father, who is revealed to be the strongest Demon Lord who challenges Arata who is now a Demon Lord candidate.
| Actor | Role |
|---|---|
 Aya UchidaKanazuki Arin (voice) | Kanazuki Arin (voice) |
 Ayane SakuraKazama Levy (voice) | Kazama Levy (voice) |
 Yumi HaraAsami Lilith (voice) | Asami Lilith (voice) |
 Ryoka YuzukiFudou Akio (voice) | Fudou Akio (voice) |
 Yoshitsugu MatsuokaKasuga Arata (voice) | Kasuga Arata (voice) |
 Rie MurakawaKurata Yui (voice) | Kurata Yui (voice) |
 Nao ToyamaLieselotte Sherlock (voice) | Lieselotte Sherlock (voice) |
 Yoko HikasaYamana Mira (voice) | Yamana Mira (voice) |
 Tomoaki MaenoAbyss Trinity (voice) | Abyss Trinity (voice) |
 Shin-ichiro MikiBiblia Gakuenchou (voice) | Biblia Gakuenchou (voice) |