Midoriha Shizuka

Backstory: When she was 9, her mother died from an illness, but due to this illness, her mother was mean and cruel to Midoriha. So, 6 months pass, and her father gets remarried, but Midoriha's stepmother was as mean as Midoriha's biological mother, but was even worse. The stepmother was a manipulator, and hated Midoriha because she thought she wasn't "lady-like." So she turned Midoriha's father against Midoriha, but the father started abusing Midoriha, so Midoriha wore a longer kimono to hide the bruises. But, when she turned 11, Midoriha's younger sister, the second youngest, turned into a demon (which was later revealed to be Akaza). By the way, Midoriha was the middle child of 5 children, with 2 brothers and 2 sisters. Midoriha's parents also ended up dying from the demon sister, but the older brother, the oldest sibling, tried distracting the newly turned demon sister, but ended up dying. However, he managed to buy enough time for Midoriha, her older sister, and younger brother, into the forest, but she lost both of her siblings. She ended up living in the forest for a year until found by a samurai. She went to Final Selection at 14, and became a Hashira at 18 (still being debated).