Natsumi Murakami (村上 夏美, Murakami Natsumi) is a character from the series Negima!: Magister Negi Magi by Ken Akamatsu and a protagonist in Kuro Arashi: The Black Storm. She is the 28th student on the class 3-A roster. She is a sweet yet shy girl who is an actress in the Theatrical Club.
She loves acting but dislikes her ad-libs as well as her own appearance because her body is not very "mature"-looking. This is made worse by being roommates with Ayaka Yukihiro and Chizuru Naba, who both have mature bodies and bigger breasts.
Kotaro Inugami, who is also staying with them, assumes the identity as her younger brother. Although the role was forced on her by Chizuru, Natsumi seems to be adapting well to the role of being an older sister. Recently however, she seems to be showing signs of jealousy regarding the girls Kotarou has been talking to after the festival. Although their difficulty expressing their feelings is the cause of many fights between Natsumi and Kotarou, it becomes apparent that they truly care for one another.
- Main article: Class 3-A
Natsumi is first given focus when she and her roommate Chizuru find the injured Kotaro Inugami in dog form. Kotaro attempts to hold Natsumi hostage for food and clothes, but a raging fever and Chizuru's motherly instincts force him to submit. In order to convince Ayaka to let Kotarou stay in their dorm, Chizuru pressures Natsumi into pretending Kotarou is her brother.
- Main article: Mahorafest
This ruse is carried to the extent where Kotaro enters the Mahora Fighting Tournament as "Kotaro Murakami." Throughout the festival, she is often seen alongside Kotaro with her other roommates.