Kinoshita Mayuri is the smartest and genius girl in science she lived in Indonesia she moved abroad to another country and after that when she entered university, she went to Japan until she graduated and supports the theory of time travel, and she is also an expert in weapons like Pistols and Katana and when he was 23 old she and her friend Miyamura who is a Firefighter who is skilled in Hand to hand Combat suddenly they both got into a wormhole and are thrown into the world of RWBY