I understand Cirno

Cirno is a videgame character

@JoeBiden like her because she most popular in touhou video game

The Video game is Touhou

Touhou is a game like Sidewinder but with anime

Many people enjoy anime and Sidewinder and Touhou

This b&w animation is most famous part of Touhou, many people like this animation

I think Cirno is probably in it, but don't know because it all black and white and Cirno is Blue

Cirno is blue

This is Cirno