Sakura Ogami
Sakura Ogami or "The Ogre" as she has been nicknamed online, is the Ultimate Martial Artist and has a 400-win streak. Even though she looks really tough and fierce, she is actually a really caring, quiet and level headed girl. She becomes really close to Aoi as the two are enthusiastic towards their sport. From the very beginning, Sakura was a very complex character. Her appearance causes people to assume that she was a very scary person and she was commonly mistaken as a guy until she clearly states that she was a girl for the rest during the first trial as she had slept over in Aoi's room because she was frightened by Monokuma's Educational DVD. She was also being blackmailed by Monokuma to kill someone if the others did not start any murders. This was in exchange for the safety of her dojo and its members. In the end, Monokuma reveals that she was a mole as she had betrayed it. This reveal causes a of fights, mainly between Aoi against Byakuya and Fukawa. During one of the fights, Fukawa, as Genocider Syo, attacks Aoi and she gets injured. She decided to end things with her own hands and wanted to make amends with the three most suspicious of her, which was Hagakure, Byakuya and Fukawa. She ended up getting attacked twice and while Aoi left the room to get Sakura a protein shake, Sakura locked the door and drank poison to kill herself. Even in her last moments, she had a smile on her face. She was confident that the others would not kill anymore and in her suicide note, she mainly addressed it to Aoi and told her to live together with their friends and that she must survive. Her words end up being a turning point for Aoi as she was about to fall into despair.