Kaede, whose full name is Kaede Saito, is a central character in the story. She is the wife of Yoshiaki Saito, the daughter-in-law of the elderly couple Shozo and Ine Saito, and the mother of their daughter, Mino Saito. By profession, Kaede works as a nurse, a role that speaks to her caring and reliable nature.

At her core, Kaede is a kind, warm-hearted, and supportive individual. She is friendly and enjoys chatting, often joining other women in the family for relaxed conversations. However, she has a very prominent and defining trait: a pronounced weakness for handsome men. This side of her personality is a major source of comedy in the story. When her father-in-law, Shozo, magically regains his youth, Kaede finds his new, young appearance overwhelmingly handsome, leading her to become flustered and forgetful around him. Her attraction to good-looking men also surfaces when she meets her daughter's boyfriend, Shota Igarashi, causing her to become overly excited. Despite this seemingly shallow trait, she remains deeply devoted to her husband, constantly reminding herself to stay calm and think of him when she finds herself swayed by another's looks. Adding a more down-to-earth quirk to her personality, Kaede is famously terrified of bugs like cockroaches, a fear that often leaves her frozen and in need of rescue.

Kaede's primary role in the story is as a supportive family member. She and her husband frequently visit and help Shozo and Ine with errands and daily tasks. She is the second person, after her daughter Mino, to discover the secret of her in-laws' rejuvenation, and she is immediately struck by Shozo's new appearance. Her relationships are clearly defined within the family. With Ine, her mother-in-law, Kaede shares a close and affectionate bond, often confiding in her about work and personal matters. With her husband Yoshiaki, her relationship is built on a foundation of mutual care, as they first met when she was his nurse after an injury during his rebellious youth. As a mother, she is loving and shares a fun, light-hearted relationship with her daughter, Mino, including a mutual interest in good-looking men.

Throughout the narrative, Kaede shows subtle development. Inspired by her mother-in-law Ine's diligent attitude toward supporting her husband, Kaede becomes more attentive to her own household chores and the preparation of Yoshiaki's lunch boxes. Her loyalty is also highlighted when she supports her husband through a difficult period after his workplace closes down. In terms of abilities, her most notable skill is her professional competence as a trained nurse, which makes her adept at caring for others, both at the hospital and within her family.