TV-Series
Description
Keito Sanada is the grandmother of the protagonist, Yuki Sanada. She is a French woman living in Japan with a warm, cheerful, and free-spirited personality. Her parenting style is notably unconventional; early in the series, she spontaneously allows Haru, a peculiar transfer student who claims to be an alien, to live in her home with Yuki. This decision, while perplexing to Yuki, demonstrates her open-mindedness and her role as an enabler of the story's central friendships.

Keito serves a vital role in the narrative as a source of quiet wisdom and stability. She is frequently depicted as a kind and thoughtful figure who is always available when Yuki needs someone to confide in. Beyond simply housing Haru, she often provides him with gentle guidance on navigating human social interactions and his relationship with Yuki, acting as a bridge between the alien visitor and the human world. Her influence is a grounding force for the main characters.

Her primary relationship is with her grandson, Yuki. As his guardian, she is deeply important to him, and her occasional health issues and hospital visits serve as a significant emotional driver for Yuki, spurring his character development and his commitment to his new friends and hobby. The frequent moves the pair make due to her work situation have historically contributed to Yuki's social anxiety and inability to form lasting friendships, adding a layer of complexity to her character as both a loving guardian and the unwitting cause of his isolation.

Regarding development, Keito is a largely static yet reliable presence, representing a constant source of familial love and support. The most notable development related to her is her recurring, though unspecified, illness, which becomes a recurring concern rather than a transformative arc for her own character. Her notable abilities lie not in physical action but in her profound emotional intelligence and her talent for offering the exact advice needed to help the younger characters understand themselves and each other. She is also employed at the Samuel Cocking Garden, a botanical garden located on the island of Enoshima where the series takes place.