In the digital version (which popularized the term), the game interface is designed to break your focus. Tsubone does not just stand there. She leans forward. She whispers taunts via Japanese voice acting (often using archaic, condescending honorifics like "Gozaru" or "Namu" ). Her facial expressions change based on the streak:
Any player must have the right to exit the game permanently at any moment without social penalty or judgment. Strip Rock-Paper-Scissors - Tsubone edition
There is a specific psychological appeal in seeing a dignified, high-status "Lady" lose her composure as she loses the game. In the digital version (which popularized the term),