Webkanao tsuyuri’s back story is explored.
Her parents had sold her to a random man for money and she started feeling numb, so that she would not feel pain.
Webtsuguko is basically a demon slayer of the demon slyer corps who is gifted with such good combat abilities that he can become a hashira one day.
Webthe tsuguko position acts as a wild card for the hashira position in the demon slayer corps, which can only be obtained by a select few who have impressed the current.
Webthe tsuguko’s goal is to replace their hashira if and when said hashira is put in a position where they can no longer fulfill their role within the demon slayer.
The term “tsuguko” (継子) translates to.
Webkanao tsuyuri is her tsuguko.
In addition to that, tengen uzui mentioned during the entertainment district arc that he considers tanjiro, zenitsu, and inosuke to.