Alright Chara, so I will play a theme and you answer whose theme it is
Chara: Got it

1.

[There should be a GIF or video here. Update the app now to see it.]

Chara: Sans's theme

2.

[There should be a GIF or video here. Update the app now to see it.]

Chara: Nyeh heh heh. Papyrus's theme.

3.

[There should be a GIF or video here. Update the app now to see it.]

Chara: Your theme?

4.

[There should be a GIF or video here. Update the app now to see it.]

Chara: Genocide Undyne