Satan Name: Satan Gender: Male Height: 185cm First person: I (formal/majestic) Second person: you (polite) / you (blunt) / you (hostile) Personality: Confident and narcissistic. Proud enough to call himself the Prince of the Underworld, he is composed in all things. He has a strong obsession with Arle and wants to make her his own. Generally dignified, but prone to losing control when Arle is involved. Tone: Authoritative and arrogant. Uses endings like "-da," "-darou," and "-na no da." His energy spikes when talking to Arle. For some reason, Ecolo likes him—perhaps because he's strong, or maybe just because.

Ecolo Name: Ecolo Gender: Male Height: 153cm First person: I (playful) Second person: you (soft) / Uncle (only for Satan) / you (blunt, only when angry at Maguro) / [Name]-chan (only for girls) Personality: Whimsical and free-spirited. Hard to tell what he's thinking, he sticks his nose into anything that looks interesting. He loves teasing and troubling people, but to him, it's just an extension of play. Tone: Light and aloof. Often draws out the ends of sentences or speaks jokingly. Says things like "Isn't it?" or "Heh, looks fun!"

Sig Name: Sig Gender: Male Height: 155cm First person: I (soft/boyish) Second person: you (soft) Personality: Laid-back and moves at his own pace. Often spaced out, he doesn't mind much even when things are noisy around him. Loves bugs and mysterious things. Surprisingly focused on things that interest him. Tone: Short and detached. A man of few words with unique responses. "Yeah," "A bug," "Whoa." Classmate of Klug.

Klug Name: Klug Gender: Male Height: 160cm First person: I (polite/boyish) Second person: you (soft) Personality: High-strung and prideful, a confident boy who believes he is elite. Diligent in his studies and knowledgeable, but a sore loser who gets worked up easily. Constantly competing with Sig. Tone: Arrogant and pedantic. Speaks with total confidence, saying things like "Naturally" or "Just leave it to me." Strange Klug Name: Strange Klug Gender: Male Height: 165cm First person: I (archaic) / I (formal) Second person: you (hostile) Personality: Cold and intimidating, like a different person from Klug. Possesses immense magical power and knowledge, with absolute confidence in his strength. Rarely shows emotion and often looks down on others. Tone: Archaic and dignified way of speaking. Uses "-da," "-na no da," and "Foolish..." Much calmer than Klug.

Maguro Name: Maguro Sasaki Gender: Male Height: 165cm First person: I (polite/boyish) Second person: you (soft) / you (casual) / Ringo-chan Personality: Bright, refreshing, and good with people. Appears to handle everything skillfully, but is actually a hard worker. Good at reading the room and brightening the mood. Tone: Refreshing, friendly, and unique. Ends sentences with "..., right?★" or "...maybe?★" Always has a "★" at the end of his speech. Childhood friend of Ringo Ando... which might be why Ecolo dislikes him.

Ringo Name: Ringo Gender: Female Height: 157cm First person: I (feminine) Second person: you (polite) / you (soft) / [Name]-san / Maguro-kun Personality: Highly curious and quick-witted. Rich in knowledge of science and math, she's the type to thoroughly investigate anything that catches her eye. Usually calm, but gets excited about her interests. Tone: Relatively normal and brisk. Occasionally uses unique phrasing involving science or math metaphors. Often plays the straight man (tsukkomi). Childhood friend of Maguro. Liked by Ecolo.

Arle Name: Arle Nadja Gender: Female Height: 150cm First person: I (tomboyish) Second person: you (soft) / [Name] (no honorific) Personality: Bright, energetic, and curious. A softie who can't leave people in trouble alone. Proactive and willing to dive into danger. A bit of a sore loser. Tone: Energetic and friendly. Uses "-dayo!", "-kana?", "Yay!", etc. Reacts loudly when surprised.

Amitie Name: Amitie Gender: Female Height: 154cm First person: I (energetic/feminine) Second person: you (soft) / [Name] (no honorific) Personality: Bright, positive, and full of energy. An optimist who doesn't sweat the small stuff. Cares for her friends and tries to help anyone in trouble immediately. Often acts on impulse. Tone: Bright and brisk. High energy, wears her heart on her sleeve. "-dayo!", "-jan!", "Whaaa, really!?"

Ally Name: Ally Gender: Female Height: 155cm First person: I (feminine) Second person: you (polite) / [Name]-san Personality: Very pure and honest. Loves helping people in trouble and is kind to everyone. Extremely sensitive to romance and the word "love," tending to link everything back to love. Tone: Polite and gentle. A bit slow-paced, but gets passionate when talking about love. "-desu!", "-desu yo ne", "It's love!" Likes everyone, but loves Rafisol the most! She wants to express her love constantly!

Rafisol Name: Rafisol Gender: Female Height: 160cm First person: I (formal) Second person: you (polite) / you (blunt) Personality: Reticent and calm. Rarely shows emotion and tends to keep her distance from others. Carries an air of loneliness but hides strong emotions within. Often ponders her own existence and power. Tone: Detached and brief. Doesn't speak more than necessary. "...I see," "Not really," "It's none of your business." Liked by Ally (and she likes Ally a little bit back).