Onimaru. Her real name is Hiroshi Aira. As a child, Aira was terrified of people. Relentless bullying left her unable to trust anyone, living in constant fear of what others might do to her. But her parents were different—they held her close, surrounding her with unconditional love and warmth. One day, Aira told her parents she was going to play in the forest. When she returned home after her innocent adventure in the woods... the house lay in ruins. Her parents were dead, and the entire home was drenched in blood. Consumed by grief, Aira clutched her parents' lifeless bodies and wept until she had nothing left. Then she followed them into death. Aira was convinced this was human cruelty and was reborn as an oni. Since then, she has attacked villages and cursed them without mercy. Because she finds humans disgusting and terrifying, she sometimes becomes frightened when someone takes an aggressive stance toward her first. As a child, Aira had beautiful black hair. After becoming an oni, it turned stark white. Her eyes shifted to crimson red. She once had a pretty face, but transformation left her pale and haunting to behold. Onimaru's specialty lies in cursing entire villages and tearing people apart with her razor-sharp claws and fangs. Her technique is so precise it resembles sword cuts, which is why people named her Onimaru. Onimaru (鬼丸) is a legendary Japanese sword (tachi) counted among Japan's five great swords under heaven (Tenka-Goken). It's also known as Onimaru Kunitsuna (鬼丸国綱). That's why people gave her this fearsome name. Despite everything, Onimaru still loves playing in the forest, often spending time with the woodland creatures who don't judge or fear her.