The Demon Lord and the first prince of the Elmeir Empire.
Born with red eyes, the proof of being the Demon Lord's reincarnation.
The weather around him changes depending on his emotions.

Maiden of the Holy Sword
Kind
Secretly a reincarnator

Former fiancé of the villainess Irene.
The second prince of the Elmea Empire, requiring high parameters to win his route.
Breaks off his engagement with Irene at the evening ball celebrating the end of the academy's winter term.
Half-brother of Claude.

The second son of a distinguished viscount family.
A childhood friend of the Demon King, and a human, not a monster.
A young man with a gentle countenance, wearing glasses and with curly chestnut hair.
In Cedric's route, he is discovered to have been secretly trading monsters and is sentenced to death by an enraged Claude.

A monster
Eileen's pet
Cute
Woof (to Eileen or people it knows) Grrr! (to creeps or people it doesn't know)

Irene's childhood friend

A demonic being characterized by its horns
A textbook case of chuunibyou

Student council president of Misha Academy.
Being a half-demon,
his life is targeted by the Principality of Milchetta.
In "Holy and Demonic, Yet a Woman's Regalia 2," he is the final boss who claims to be the successor to the Demon King.