Masami "Mami" Konno: The protagonist of the series. He's a high school student who finds himself drawn into the world of "magical girls" when he encounters a magical girl named Yumi. He's initially reluctant to become involved, but eventually decides to help Yumi. He's often seen as a relatable character who is trying to navigate the complexities of being a magical boy.
Yumi: A magical girl who is tasked with protecting Earth from evil forces. She's initially portrayed as a serious and professional fighter, but later reveals a playful and carefree side. She serves as a mentor to Masami, teaching him the ways of being a magical boy.
Ruka: A magical girl who is known for her aggressive and impulsive personality. She is fiercely loyal to her friends and is always willing to fight for what she believes in. She initially clashes with Masami, but eventually comes to respect him.
Aoi: A magical girl who is known for her calm and collected personality. She is a skilled strategist and is often seen as the voice of reason in the group. She is close friends with Ruka and often acts as a mediator between her and Masami.
Saki: A magical girl who is known for her shy and timid personality. She is a skilled artist and is often seen as the group's artist. She is initially reluctant to fight but eventually overcomes her fear and becomes a valuable member of the team.
Mari: Masami's childhood friend and crush. She is a popular and outgoing girl who is initially unaware of Masami's magical activities. She later becomes aware of his secret and becomes a supportive friend.
These are the main characters, but there are many other supporting characters who play important roles in the story.