Mai Sakurajima (桜島 麻衣, Sakurajima Mai) is the main character of the Seishun Buta Yarou wa Bunny Girl Senpai no Yume wo Minai series. She is a notable actress/model and a third year at Minegahara High School, the same school as Sakuta Azusagawa. Mai is a serious individual, especially around Sakuta Azusagawa. She is very sensitive, polite, levelheaded, helpful, and kind. She isn't harsh by default, but she can become easily annoyed and come across as somewhat snappy or violent especially to Sakuta. Mai tends to ignore and stuff down unpleasant feelings rather than deal with them. Sakuta often points out that she is "dishonest", often lying about her feelings. Despite her snarkiness, she's pure-hearted and even shy around Sakuta's jokes. Mai is also very intelligent; she's implied to have very good grades and even helps Sakuta study at one point. Mai found early fame as a model for television, magazines, and books due to the fact that her mother ran a photographing agency. While she did enjoy her job as a model in the show business, the pressure of being in the public began to take its toll on her. After being tricked and forced to participate in a swimsuit photoshoot by her mother in her early school years, Mai realized she was simply being used as a tool to make her mother easy money and took a hiatus from acting as a way to get back at her, deciding to attend highschool. However, because of work commitments made prior to her decision to go on hiatus she wasn't able to attend school until half-way through her first year. By then, social circles had formed, making her the "odd one out" and causing her to be isolated. As a result, the student body didn't know how to deal with her; While they had no reason to bully her, they also feared associating with her would cause themselves to be isolated as well. Two years and several months since beginning her hiatus, Mai went to a library wearing a bunny costume to see if anyone would notice her. She then came across a boy named Sakuta Azusagawa, who was the only person in the building able to see her. After introducing themselves, however, Mai ordered Sakuta to forget about her. (Source: Seishun Buta Yarou Wiki)

Roy Mustang is the "Flame Alchemist," having absolute control over heat and fire through alchemy. Using special gloves that create a spark when he snaps his fingers, Roy can create anything from a tiny ember to burn a letter, to a raging inferno that can destroy a humanoid body in seconds. His precise control over the alchemically enhanced flame is so accurate that he can boil the water in a persons' eyes and can also attack enemies amongst a riot without hurting any allies. Outwardly arrogant and playfully manipulative, Mustang is intelligent and almost always one step ahead of his opponents, and likes to feel in control of the situation. He is one of the superiors of Edward Elric. On the surface, he appears to be nothing more than a man of the military who pursues promotions and praise and is considered a ladies' man who constantly goes on dates with different women. Mustang's true goal is to become Führer in order to gain the power to reform the government in order to absolve his sins in the Ishval War as well as change the country for the better, along with the joking requirement for female officers to wear tiny miniskirts (which considerably increased Havoc's loyalty to him and caused Hawkeye to be angry with him). His goals are admirable enough that he earns the fierce loyalty of his good friends Lt Col. Maes Hughes, Major Alex Louis Armstrong, and his own subordinates, among whom are Riza Hawkeye, Jean Havoc, Heymans Breda, Vato Falman, and Kain Fuery. While Mustang has a close and amicable relationship with all of his subordinates, he appears to share a deeper bond of affection with his second-in-command Riza Hawkeye, who has devoted her life to supporting him. This bond culminates in the final episodes of the anime when Mustang chooses Hawkeye alone to accompany him on his greatest and most dangerous mission. Though a hero of the Ishval War, he remains haunted by the horrors of war and suffers great remorse for the lives he took. (Source: Wikipedia)