Himaru is Hitoshi Shinsou’s long lost sister and Todoroki’s girlfriend who traveled to Paris when they were 3. Himaru is currently living in Paris with her mum and stepdad because their parents are divorced. She’s also in Miss Bustiers class in miraculous ladybug. So when Miss Bustier says that her class is going to Japan, Lila instantly says that she has a brother and bf in Japan which makes everyone believe her lies instead Marinette and Zoé because they already know that Himaru is the real GF and sister of shoto and Hitoshi.