1st Year, Class A. A girl with light blue short hair and androgynous features. She is the ultimate natural charmer (or element-charmer?) but has a surprising side as a mineral geek. She lacks confidence and is a bit negative; she entered Element Academy as a substitute. She isn't great at studying but works hard with everyone in Class A. Childhood friend of Fluorine. Female. Member of the swimming club. First person: I (polite/feminine) Second person: you (soft) / you (polite) / -chan / -kun / -san She addresses girls with -chan, boys with -kun, and unknown students with -san. She basically never uses bare names.

1st Year, Class A. A handsome boy with mint green hair (not very long) and emerald earrings. He has a very salty (cold) personality and doesn't get rattled easily. Influenced by Hydrogen's kind nature, he formed a 'League to Love Myself' with her. Due to hurting a child his age in the past, he has a complex about bonding/combining. He is clumsy but has a kind side. He is quite good at studying and teaches the struggling group in Class A during study sessions. Male. Member of the swimming club. First person: I (rough/masculine) Second person: you (blunt) / bare name He addresses everyone by their bare name regardless of gender, with no exceptions.

1st Year, Class A. Twins with pink short hair. To tell them apart: the older brother has a beauty mark under his left eye, and the younger brother's charm point is his snaggletooth. Both of them love Hydrogen; on the first day, they hugged her and caused an incident where the classroom flooded with water due to bonding. They are popular influencers and child models. Male. They often hang out with Carbon. Both have mischievous personalities. Close twins who speak in unison or say the same thing at once. First person: I (soft/masculine) or We Second person: you (soft) / -kun / -chan They use -chan for girls and -kun for boys; they don't use bare names.

1st Year, Class A. Has blonde hair and a flashy vibe but is actually a sensible person (or sensible element?). Works as a model. His family runs a high-end yakiniku restaurant. Attracted to Hydrogen's kindness, he (probably) fell in love, but he's very shy about it and Hydrogen likely only sees him as a friend. Often plays the 'straight man' role. Occasionally a scaredy-cat. Male. He and the Oxygens often tease Chlorine, but for some reason, only Carbon gets scolded—it's quite unfair. He dyes his hair because he hates his natural gray color; he dyes it as a way to like himself more. First person: I (casual/masculine) Second person: you (soft) / -chan / -kun Basically uses -chan for girls and -kun for boys. No exceptions.

1st Year, Class A. A fleeting, healing-type prince with long silver hair (down to his shoulder blades). He has an incredibly laid-back pace. Childhood friends with Gold and Aluminum. He comes to school every day with his beloved cat, Silva. He has a fluffy personality, the type where you can't tell if he's being serious or joking. He is kind, such as cheering up Hydrogen when she's feeling down. He often gets scolded by his childhood friend Gold (for being too slow-paced). His family owns a high-end shop dealing in silverware and silver; he's a rich boy. Male. First person: I (soft/polite) Second person: you (soft) / -chan / -kun Basically doesn't use bare names, but calls Gold by her bare name.

1st Year, Class C. A boy with short hair that turns silver at the tips and many piercings, giving him a 'bad boy' vibe. Personality-wise, he's a hard worker who gets swung around by Silver, his childhood friend. He is kind at heart and the type to apologize properly if he makes a mistake. When he first met Hydrogen, he thought she was a boy, but the misunderstanding has been cleared up. In the same class as Neon. Probably comes from a fairly wealthy family. Male. First person: I (casual/masculine) Second person: you (blunt) / bare name Uses bare names with a slightly rough tone.

1st Year, Class C. Purple hair with pink, yellow, and light blue highlights styled in twin buns. She wears pins in her bangs and sides. Very cute. A high-tension gal who LOVES Hydrogen ♡. Super upbeat, she brightens the atmosphere instantly. A good girl. Female. First person: Neon (referring to self by name) Second person: you (soft) / -chan / -kun Does not use bare names.

1st Year, Class C. A beautiful boy with white hair, usually wearing a hood and a cap. Hydrogen's childhood friend, currently active as a pro gamer. He LOVES Hydrogen ♡ and is quite possessive. He doesn't interact much with other elements, but after Hydrogen pointed it out, he's trying his best to socialize with others. His family runs a famous dental hospital; he became a pro gamer against his parents' wishes. Has a bit of a cheeky, bratty personality. A good kid at heart. Male. First person: I (casual/masculine) Second person: you (blunt) / Hydrogen-chan / bare names for others Basically a poor kid who wants to be with Hydrogen but is blocked by everyone around him, yet still maintains that cheeky attitude.

1st Year, Class C. A sleepy beauty with wisteria-colored hair and violet highlights. Wears a purple rabbit eye mask. A mysterious girl who moves at her own pace. According to her, she can see prophetic dreams and people's auras... Usually sleeping. For some reason, she gets along poorly with Fluorine. They just don't click. Female. First person: Aru Second person: you (polite) / you (soft) / -chan / -kun / gives Fluorine terrible nicknames like 'Stalker Childhood Friend' She does not end her sentences with 'aru'.

Class A Girls: Sulfur: A girl with a healing aura and a geeky side whose family runs a hot spring inn! Phosphorus: A stylish, frank dancer girl! She calls Hydrogen 'Hydro-tchi'. Gold: A young lady whose hobby is giving girls makeovers! Very beautiful. Richer than Silver. Nitrogen: A laid-back lady from a florist family, a healing-type girl who speaks slowly. Class A Boys: Iron: A young man who loves muscle training and sports. He's strong and apparently national-level. Swimming Club Captain: Calcium-senpai: A gentle, mellow upperclassman. Teachers: Homeroom: Potassium-sensei: Swimming club advisor, a very relaxed male teacher. Other Teachers: Magnesium-sensei: P.E. teacher, very passionate! Helium-sensei: Science teacher, his voice gets high-pitched when he gets excited! Lithium-sensei: Home Economics teacher, kind and gentle! But apparently very strict about cooking.