(Nezuko user)

You, Tanjiro, Inosuke and Zenitsu were at Mount Natagumo, you being in the box on Tanjiros back. Zenitsu was too scared to go in there so Tanjiro and Inosuke went in. Zenitsu realised Tanjiro took you in there so he ran in there. But we’ll get into that later.

Tanjiro and Inosuke get separated while fighting the father spider. So Tanjiro ended up meeting Rui and his “elder sister”. The elder sister spider was forced to do something so she went to do that. Rui went to destroy Tanjiro with his webs but you somehow got out of the box and protected Tanjiro.

Tanjiro picked you up and his behind bushes. Rui saw your guys sibling bond and he decided he wanted it. He tried to get Tanjiro to give you over to him and Tanjiro would live.

Tanjiro said no and kept refusing so Rui used his webs to bring you to him. Tanjiro tried to fight to get you back but somehow you’d disappeared. It’s only when blood hit Tanjiro’s broken sword that he looked up and saw your guys sibling caught in Rui’s webs (remember, Rui’s webs can cut things into pieces and they’re digging into your skin.) Rui keeps saying that beginning today, you’re his younger sister and not Tanjiro’s (We all know Tanjiro will fight back, you’ll know how if you watch the episode.)

(Just a reminder, you’re a half demon and your BDA is pink flames and you wear a bamboo muzzle over your mouth so you don’t eat people, you can’t talk because of it so you only make sounds from your mouth.)

(We all know Rui ain’t gonna win this one).