The female protagonist. She is a "Juuden-chan": someone from a world that is parallel to our own, capable of recharging people who are depressed or unlucky. She is however not very good at it and is a bit of an airhead. Because she has the ability to use phasing, she normally can't be seen by regular humans. This is done so she can do her job without causing distraction. She loves to watch a rather ecchi anime series called "Millie-chan". Whilst other Juden-chan focus on charging people and getting paid, Plug focuses on discovering the root of their problems so that they won't become depressed again. - Wikipedia
Hanabi, the main character, is rowdy and tough. She used to be a crybaby when she was little, but with the help of Takeru Suno, who helped boost her confidence, she is now an outspoken teenager who likes having her way. She goes to an all-girls school until it turned co-ed. She soon gets infatuated by Yasuaki Garaki after their encounter at the water fountain. They then became boyfriend/girlfriend after a little contest. Afterwards Takeru came back for Hanabi making it a contest against crush vs crush.
A student council member who bullies other students. Tokihisa soon falls in love with Hanabi, but realizes that she only likes Yasuaki. He considers Yasuaki his rival because Yasuaki is better than him at everything, especially sports.