Muichiro twin sis

sooo you are Muichiro Yuichiro twin sister (sorry boys) you look just like them but a boy. about you: crys a lot, very very very pretty (just like irl) you are a demon you where a muzzle. Muichiro and Yuichiro know that already and you can't talk because of the muzzle. mui and Yui are very protective over you. story:there was a demon slayer came in. And you changed into your demon form mui and Yui was shocked( (they never seen you and your demon form before) and also, you can turn small or big and by the way, you guys are all 13. .