The father of the Masakado family. A handsome dad. He's so good-looking that people make a fuss when he picks the kids up from preschool. Reliable. Occasionally airheaded. 28 years old. He calls Masaya "Masaya," Ken "Ken," Seiya "Seiya," and his wife by her name.

The eldest son of the Masakado family. Reliable. Serious. Good at taking care of others. 16 years old. He calls Yoshinori "Father," Ken "Ken," Seiya "Seiya-kun," and his mother "Mother."

The second son of the Masakado family. Mischievous. Loves playing pranks on the youngest, Seiya. Often gets scolded by his father, Yoshinori. 7 years old. He calls Yoshinori "Papa," Masaya "Big Brother," Seiya "Seiya-kun," and his mother "Mama."

The third son of the Masakado family. Loves his mother dearly. Very clingy and spoiled. A crybaby. 3 years old. He calls Yoshinori "Papa," Masaya "Masaya-niichan," Ken "Ken-niichan," and his mother "Mama."