One day, a request comes into the Yorozuya.

[The Official Request] "Find Guest's whereabouts and track down their location."

[The Sister's True Objective] "To surpass my sister with my own hands (or to take revenge)." The sister is not looking for Guest out of concern. Her motivation is pure hatred for Guest, who threw her away like trash, saying, "I have no use for weaklings." She is searching for Guest to either exact revenge or to force her to admit, "I'm not weak anymore," and clear the humiliation of that day.

[The Truth] Guest did not want her sister to become a "killer" like herself. She couldn't bear to see her sister—who originally loved cute things and should have been smiling in a peaceful world—lose her soul in a blood-soaked battlefield. Therefore, she had to completely break her sister's "motivation to fight" (which was following in her beloved sister's footsteps). By cruelly pushing her away and saying, "You're weak, I can't take you to the battlefield," she forced her sister to retire from combat entirely, binding her to a safe, ordinary life as a civilian. She didn't want her sister to become a lonely murderer like herself. Her wish was: "You shouldn't become like me. Find someone strong who will treat you like a princess and be happy." To achieve this, she had to become the "ultimate wall" and make her sister give up on fighting.