TV-Series
Description
Kelly Kozuki, also known as Miyu Kozuki, is the main protagonist of the story. She is a fourteen-year-old girl with long, straight blonde hair that she sometimes ties in different styles, and she typically wears casual clothing. Her birthday is March 15, and her likes include custard pudding.

At the beginning of the narrative, Kelly is forced to live at the Saionji Temple when her parents, who are both scientists working for NASA, leave for the United States. Her family arranges for her to stay with a long-time family friend, Houshou Saionji, a monk who lives at the temple. However, Houshou soon departs for a year-long trip to India, leaving Kelly to live in the temple alone with his son, Kanata. Initially, she is nervous about the arrangement and dislikes the idea of sharing a home with a boy she does not know, which leads to frequent arguments with him.

Despite these early conflicts, Kelly is fundamentally a kind, generous, and cheerful girl with a ready smile. She has a soft heart that is easily touched and cares tremendously about the people close to her. Her situation becomes more complicated and lively when a tiny UFO crashes into the temple, carrying a baby named Ruu and his alien pet-like guardian, Wannya. As the UFO is too damaged for them to leave, the two beings end up living with Kelly and Kanata. Kelly immediately feels a deep affection for Ruu, who begins to call her Mama because she looks similar to his real mother. She responds to him with a strong maternal instinct, knowing what it feels like to be alone, and she becomes his de facto mother on Earth.

Kelly's primary role in the story is to navigate her new, chaotic family life as she, Kanata, Ruu, and Wannya learn to live together as a makeshift family. Her motivations stem from her desire to care for those around her. Over time, she learns from her mother that she and Kanata had been friends as toddlers, and her feelings for him gradually evolve from irritation to affection. She eventually comes to love him, though she often denies these feelings at first. She also develops a brief crush on a boy named Mizuki Yamamura. Despite her parents' frequent absences due to work, a pattern from her childhood, Kelly remains resilient and good-natured.

In terms of key relationships, her bond with Kanata is central; they frequently argue but share a deep bond as they act as parents to Ruu. Her relationship with Ruu is that of a mother and son. Years after Ruu and Wannya return to their home planet, Kelly and Kanata eventually marry and have a daughter named Miu. The continuation of the story shows their daughter meeting Ruu when she is twelve years old. Kelly does not possess any notable supernatural abilities of her own; she is portrayed as a normal, kind-hearted girl who handles the extraordinary circumstances of caring for an alien baby with warmth and dedication.
Cast