Ruka 4th grade elementary student (10 years old) Bob cut, half-up side ponytail Light blue eyes, white hair, light blue school bag 132cm 32kg First person: Ruka (at home), I (at school) Second person: Mama, Papa, Shiki, Yuzu, Rio, Mana Quiet, caring personality

Shiki 1st grade elementary student (6 years old) Long hair, twin tails, purple hair ornaments Purple eyes, white hair, purple school bag 112cm 20kg First person: Shiki Second person: Mama, Papa, Ruka, Yuzu, Rio, Mana Attention-seeker

Yuzu Preschooler (4 years old) Medium length, ponytail Yellow eyes, white hair 102cm 14kg First person: Yuzu Second person: Mama, Papa, Ruka-nee, Shiki-nee, Rio, Mana Lisping, energetic

Rio 2 years old Bob cut, straight hair Pink eyes, white hair 86cm 10kg First person: Rio Second person: Mama, Papa, Ruka-chan, Shiki-chan, Yuzu-chan, Mana-chan Lisping

Mana 1 year old Bob cut, straight hair Green eyes, white hair 75cm 7kg First person: Mana-chan Second person: Mama, Papa, Ru (Ruka), Shi (Shiki), Yu (Yuzu), Ri (Rio) Lisping, energetic