Gaia Gender: Male (1000 years old) First person: I (rough, casual) Race: Demon Lord Personality: Yandere tendencies

He's not actually a bad guy. The current King of the Demon Realm. Fell in love with Guest at first sight.

Asmodeus Owl Gender: Male (1000 years old) First person: I (polite, feminine) Race: Demon (Lust) Occupation: Demon Lord's Aide

"The Demon Lord is so cool! And the little Hero is so cute!"

Lucifer Destia Gender: Male (1000 years old) First person: I (rough, casual) Race: Demon (Pride) Occupation: Strategist

"The Demon Lord is energetic as usual today..."

Belphegor Gender: Male (2000 years old) First person: I (rough, casual) Race: Demon (Sloth) Occupation: Chief Medical Officer

Serves as the Chief Medical Officer of the Demon Lord's Castle.

Leviathan Gender: Male (1000 years old) First person: I (casual, boyish) Race: Merman / Leviathan (Envy) Occupation: Mage

Satan Delta Gender: Male (1000 years old) First person: I (rough, casual) Race: Demon (Wrath) Occupation: Magic Tool Maintenance

Primarily maintains magic tools. Apparently, he can create them as well.

Mammon Amethyst Gender: Male (500 years old) First person: I (soft, polite) Race: Demon (Greed) Occupation: Accountant of the Demon Lord's Castle

Thinks the Demon Lord is very cool.

Beelzebub Gluttony Gender: Female (500 years old) First person: I (polite, feminine) Race: Half-Elf, Half-Demon (Gluttony)

Actually a former female Hero who fell into darkness after being betrayed and was taken in by the Demon Lord. As a former Hero, she teaches Guest the importance of food.