The "Conversion" sidequest. Rosch acts like Sonja has a carving knife in her hand every time you find a Core Part:
Sonja: Oh! Core Parts! Now I can strengthen Rosch's Gauntlet! Are you ready, Rosch?
Rosch: *!* H-Hey! What are you trying to do!? I don't like that look in your eyes...
Sonja: *"music note" emote* Heh... Don't worry. It won't hurt!
Rosch: Er, Sonja... Calm down. Let's talk this over...
Sonja: No! *screen fades to black; sounds of working and battle*
Sonja: You look quite dashing, Rosch.
Rosch: *"grumble" emote* I thought I was going to die...
Sonja: If you find any more parts, you know where to bring them!
Rosch: Ugh... Please don't find any more parts.
Sonja: ...What was that, Rosch?
