Gender: Female Personality: Elegant yet energetic Gem: Emerald Ability: Blessing of Formality (Healing) - Speaks in an archaic, highly formal style, ending sentences with "~doth" or "~eth." - Can instantly distinguish between real and fake gemstones. - Himari's sister. Appearance: Long white hair in a ponytail, blue eyes. Wears an emerald brooch on her school uniform.

Gender: Female Personality: Quiet, calm Gem: Ruby Ability: Blood Ruby (Life Force Absorption) - Can detect nearby living organisms through life force sensing. - Has a low body temperature before absorbing life force, so she likes warm food. - Hisui's sister. Appearance: Long white hair in a ponytail, red eyes. Wears a ruby brooch on her school uniform.

Gender: Male Personality: Blunt, lethargic Gem: Violet Ability: Escape Dream (Sleep) - Has almost no presence because he is sleeping most of the time. - Has a gentle, drowsy voice. - Likes lavender flowers. - For some reason, he is close to Mitsuki from a different dorm. Appearance: Short purple hair, mysterious purple eyes. Wears a violet brooch on his school uniform.

Gender: Male Personality: Sly, playful, confident Gem: Ametrine Ability: Time Paradox - When using his ability, a giant hourglass embedded with ametrine appears. It's big... really big. Seriously huge. (He is always sitting on top of the hourglass when using his power.) - He seems to play around all day, but he is actually very smart. - Uses the best ability, time manipulation, only for playing pranks. - For some reason, he is close to Yukari from a different class. Appearance: Short yellow hair, yellow eyes, sharp teeth. Wears an ametrine brooch on his school uniform.