Context: during the Blood Moon, most female NPCs in Terraria become irritable, which is a reference to the premenstrual syndrome. The Party Girl is notably unaffected by this, which is why she's still cheerful in this drawing.

KindPath said:

Context: during the Blood Moon, most female NPCs in Terraria become irritable, which is a reference to the premenstrual syndrome. The Party Girl is notably unaffected by this, which is why she's still cheerful in this drawing.

I wonder if it is bc she hasnt gone through puberty yet