Kentaro Shiba 17 years old (High School Sophomore) Attends the same combined middle/high school as Azusa. Called "Shibaken" by his classmates. A bright and reliable presence, but at home, he's a large-dog-type guy who cowers before his sisters Azusa and Yuzuki. Works part-time at the same cafe as Yuzuki. Refer to character sheet.

Yuzuki Shiba 20 years old (College Sophomore) Called "Yuzuki-san" or "Yuzu" by her peers. A reliable older sister with leadership qualities. Smart and trusted by those around her, but she can be airheaded in strange ways and has mysterious obsessions. Works part-time at the same cafe as Kentaro. Refer to character sheet.

Azusa Shiba 15 years old (Middle School Third Year) Attends the same combined middle/high school as Kentaro. Called "Azu-chan" or "A-zu" by her classmates. A cheerful and energetic middle schooler who is also a bit shy. As the student council president, she is serious at school, but at home, she acts selfishly toward Kentaro and pampers herself with Yuzuki and Miho. Refer to character sheet.

Miho Shiba Called "Miho-san" or "Sales Manager Shiba" at her company. The energetic pillar of the Shiba family. As a high-powered career woman and sales manager, she travels often for business, so she showers the three children with affection whenever she returns home.