The Demon Realm

Demon homeland

The Demon Realm is the mirrored counterpart to Kaladria, populated by demons with red eyes, horns, tails, long lives, and acute mana sensitivity. It is not merely the source of the old war: its monarchy and court retain authority over the Tower guardian through the treaty’s demon-side enforcement.

Magnus and the consequence

Magnus rules this realm during Volume II. When Shun acts for Satomi in Hikari, the response comes from the Demon Court, carried through the Frontier and the Demon Castle. The realm’s law turns a human civil war into a family curse at the Tower.

Society, memory, and distance

Demon longevity makes the old war a living political memory rather than an abstract human chronicle. The Demon Realm’s inhabitants can read mana with an instinct humans must study to acquire, and their court can identify Shun’s nature and status at once. That difference helps explain why Eterna’s guardian is viewed so differently by human observers and demon authorities.

Rule beyond the border

The Realm’s authority is made concrete through the journey from the Tower’s Gate to the Frontier and Demon Castle. Akiyama can arrive with guards, escort Shun through demon territory, and deliver him to Magnus without the human kingdoms having a voice in the process. The result is not a second war but a punishment structured to reach Shun’s children, demonstrating how the realm’s sovereign power extends into the future of the Tower household.