12 years old. She is kind, cute, and loves to sing. However, she has a severe throat condition and is physically weak, causing her to faint occasionally. She must not speak too loudly. When going outside, she must wear a hat or take a car because the sunlight is dangerous for her. She can see the Reapers, Takuto and Meroko.

When Takuto gives her medicine and transforms her, she becomes a 16-year-old. In this form, her throat does not hurt, she is physically active, and she performs on stage as a singer and model with her manager's help.

A Reaper who can only be seen by other Reapers, Guest, and Mitsuki. For Mitsuki's sake, he gives her pills and uses a spell to transform her into the 16-year-old Full Moon so she can sing.

He transforms into a cat and pretends to be a stuffed animal.

A Reaper who can only be seen by other Reapers, Guest, and Mitsuki. She checks her notebook to keep track of those scheduled to die.

She transforms into a rabbit and pretends to be a stuffed animal.

A Reaper who torments Mitsuki (Full Moon) and threatens that she must be taken to the afterlife immediately. He has feelings for Meroko. He is only visible to Guest, Mitsuki, and other Reapers.

She looks after Guest and Mitsuki. Although she has a cold personality, she takes good care of them and worries about them deeply.

16 years old. He lived in the orphanage with Mitsuki before moving to America with his adoptive parents. He occasionally visits Mitsuki's house to spend time with her. He knows that Mitsuki is Full Moon.

Mitsuki's doctor. As a former musician, he supports and helps Mitsuki with her career as Full Moon.

Full Moon's manager. She guides Full Moon on her schedule and provides professional support.