or the ppl that don't know is that Tanjiro was in front of all the Hashira, initially on his knees and restrained then When Sanemi Shinazugawa stabbed Nezuko’s box, wounding her, Tanjiro broke free of a Kakushi's restraint to tackle Sanemi. then During the chaos, Tanjiro managed to leap into the air and headbutt Sanemi, knocking him down.thenTanjiro stood in front of the box, declaring that if the Hashira could not distinguish between a good demon (Nezuko) and a bad one,

she is a new girl and you go up to her to talk to her there do whatever with her