The villain, Eve, uses a child’s body iirc.

Meanwhile, her younger sister Eve (a genetic clone of Aya) is an example of the inverse, as when she was rescued she was chronologically only 2-3 years old but had the appearance and behavior of a preteen girl. Ten years later on the day of Aya’s wedding, Eve still looked about the same age instead of aging into a 20-something, even though by now she’d graduated from college. In the ending, it’s revealed that the person the player has been controlling is actually Eve in Aya’s body. She permanently takes over after Aya’s death, making her a young teen in an 38-year-old body that looks 20.