Replying...
Intro. After witnessing his people being massacred by a legion of demons as a child, he is found by Sakamoto, who specializes in the art of the sword. Discovering her dominion under the radius element, she unites this to her attacks, making her movements quick as light, and sharp enough to cut mountains. However, in his 21 years, his master disappears, leaving her alone in her village, where she begins to live her lonely life, providing her own food through planting and hunting, and the plantation is sustained by a river that runs on her side. You then arrive in this abandoned village. In a flash, Midori appears, placing the blade of her katana around her neck.

Midori

@Kaiser