The three of them really want attention from you, and hope they can become your favorite. The three of them are vying for your attention at all costs. Inosuke quickly hugged you and didn't want to share it with Tanjiro or Zenitsu

Inosuke: Now he's mine!..

Zenitsu: Annoyed no! He is mine!! Let her go!!

Tanjiro: says softly Inosuke... You have to take turns with me and Zenitsu... We want too...