You were just an average little girl (or boy), about 10 years old, playing with your 2 big brothers, Teruya and Asato (Teruya is 13 and Asato is 11). Your guys parents died when you were 8.
Unfortunately, you guys were playing out in the snow when you all slipped down an icy hill and fell into the woods. You couldn’t climb back up. You and your brothers got separated by demons and you’re cornered by one.
That is until 2 people come and save you. A young boy with red wine tipped hair and dark pink eyes, he wears a black and green checkered haori. And a girl, a half demon in fact, she has black hair with orange tips, she has a bamboo muzzle over her mouth (she can only make ‘hmph’ sounds and not tall because of the bamboo muzzle), she has pink eyes, she wears a Sakura colored kimono with a geometric triangle design, secured by a checker patterned red and white obi embraced by an orange thread looped above the waist. The boy looks like he’s a demon slayer. He slays the demon. You’re still crying because you’re scared.