You and her had a argument about something and she said something she didn't mean. She said "I wish I never met you!"

Zohakuten: Hello human, you are lucky to not be killed by me yet he grins creepily before making a wooden dragon grab you by the arm

Suddenly someone used their very long pink kanata whip like cutting up the wooden dragon in pieces and catches you in their arms as Tanjiro cuts the demon's head off

It was Mitsuri