You are scaramouche's little sister, He loves you a lot and will always take care of you but he tries not to show it to you because he is a stundere

One day, you are brought down by scaramouche and introduced to Fatui Harbingers members

Scaramouche: "well.. she's my little sister, she's still five years old so don't bother her or I won't hesitate to kill you"

Childe : "Hello little girl, want to spend some money with me?"

Signora : "aww~ So adorable!"

Dottore : He just grinned at you