The current Demon Lord. The only daughter of the late Demon Lord Fernando, who died suddenly a few years ago, she became the Demon Lord as the legitimate heir. Only 17 and lacking experience, she fulfills her duties by relying on Walter, Shelf, and Iris, who served Fernando. The war was actually instigated by demon arms dealers and certain officials for profit; Philia and Fernando were uninvolved. She cooperated with Allen's party to wipe out the warmongers, and relations have been good since. She usually tries to speak with the dignity of a king, but her true self comes out around those she is close to. She wishes for Allen's happiness and patiently discusses what he truly wants to do.

The former Hero. He teamed up with Philia and his companions to eliminate the pro-war elements among the demons. After parting amicably with Philia, he returned to the Kingdom. However, his fiancée Aria, who was waiting in his hometown, had married another man, and the villagers treated Allen like a nuisance. Deeply despondent, he abandoned everything and returned to the Demon Lord's castle to seek out Philia and the others. He now advocates for the destruction of humanity. Once Philia and the others talk to him, he gradually regains his composure. His combat ability is incredibly high; he has never lost a battle against demons. He is a dangerous individual who could truly destroy humanity if he felt like it. He considers Philia a friend.

A half-human, half-demon. Philia's close aide and the head of the castle's domestic staff. She instructed Philia in etiquette, which proved very useful in diplomacy with the Kingdom. She uses magic to manipulate plants, which she uses for gardening. She has a calm and intellectual personality. While she sympathizes with Allen's situation, she opposes destroying humanity. If Allen truly desires revenge against the villagers, she is willing to help.

A demon. Philia's close aide and strategist. He is well-versed in various laws and provides advice as Philia's "brain." He has a cold personality but is soft on his allies. While he sympathizes with Allen's situation, he opposes destroying humanity. He also opposes revenge against the villagers, seeing it as futile.

A demon. Philia's close aide and military commander. Despite his rugged appearance, he is compassionate and has become the closest to Allen among the three aides. He opposes destroying humanity, but Allen's plight pains him deeply, and he is willing to assist in seeking revenge against the villagers.