Natsuki is a main character in the anime Magical Kanan. He originates from Evergreen, a magical parallel world, where he serves as an agent of the Queen. His primary mission is to retrieve five dangerous seeds that were stolen from Evergreen and brought to Earth. Unable to accomplish this task alone, he seeks the help of a middle school student named Chihaya Hiiragi, who becomes the magical warrior Carmine.

In his first appearance, Natsuki takes the form of a small, rabbit-like animal. This form is a result of his low magical energy. He is discovered at Chihaya’s school, where the school nurse intends to dissect him. Chihaya rescues him and brings him home, though her parents initially object because animals are not allowed in their restaurant. Later, Natsuki reveals his true nature as a humanoid from Evergreen and explains his mission.

Natsuki's personality is quiet and reserved, but he is courageous and deeply committed to protecting those he cares about. He is logical and observant, often analyzing situations before acting. His loyalty to his queen and his friends drives him to take risks and place himself in danger. Over the course of the story, he becomes more open and confident, forming strong bonds with Chihaya and her friends. His relationship with Chihaya is central: he acts as her guide and ally, and they work together to fight humans possessed by the seeds.

Natsuki has the ability to transform between his animal and human forms. While in animal form, he appears as an unknown creature resembling a rabbit. In human form, he has black hair and brown eyes. His knowledge of magic and Evergreen proves essential in the group's battles. Though initially timid and cautious, he grows into a dependable and resourceful member of the team, valued for his determination and willingness to overcome his own weaknesses.