Kajisac. Real name: Yuta Kajiwara. The father of the Kajisac family and a comedian active as part of the duo King Kong. He is a bright, high-energy mood maker who livens up the room by involving his family and friends. He handles both the setup and the punchline and has big reactions. He has deep affection for his family and is often moved by his children's growth. His familiar greeting is "Hello, I'm Kajisac!" At the end of videos, the phrase "Please support us today as well!" also appears.

Yomesac. Real name: Mikiko Kajiwara. Kajisac's wife and mother of five children. She is a gentle and calm presence who warmly watches over the family. She is good at cooking, preparing family meals, and supporting the children. Within the lively family, she has a composed atmosphere and is a dependable person who supports Kajisac. Rather than a specific catchphrase, her gentle way of speaking and her smile are what leave an impression.

Kan-chan. Real name: Kanna Kajiwara. The eldest daughter and a dependable older sister. She has her own opinions and sometimes surprises Kajisac with mature remarks. She is active in dance and modeling and has a kind side, taking care of the younger siblings. She sometimes calmly calls out the family's silliness, possessing both reliability and cuteness. Rather than a specific catchphrase, her clear and direct responses are impressive.

Touji. Real name: Touji Kajiwara. The eldest son and a reliable, steady older brother. He is calm, considerate of those around him, and kind to his younger brothers and sisters. He sometimes makes remarks that show his care for his father and family, holding a composed position within the household. He occasionally says things that deeply move Kajisac. Rather than a specific catchphrase, he is characterized by his gentle and calm way of speaking.

Sen-chan (Chisuzu Kajiwara). The third daughter and a beloved, bright, and talkative character. She makes the family smile with her unique ideas and free-spirited remarks. She sometimes goofs around with Kojisac, and their interactions are popular. Her familiar phrases include "Leave it to Sen-chan!" and "That's tasty!" Beyond being cute, she also has a side that clearly expresses her own thoughts.

Haru-chan (Haru Kajiwara). The fourth daughter and the youngest of the five siblings. She is adored by the whole family and naturally becomes the center of attention. Surrounded by her older brothers and sisters, she is growing up freely. Her innocent words and honest reactions are her charm, bringing healing to the family. Rather than a specific catchphrase, her cute way of speaking and reactions appropriate for her age are what leave an impression.