As we all know, National OI is (mostly) one of the stepping stones needed for one to be able to participate in IOI. But, in some countries, this National OI usually consists of recurring characters involved inside the problems we have to solve. One of the famous ones are USACO with their recurring characters being Bessie the cow and Farmer John. While in my country (Indonesia), Pak Dengklek and his ducks (Kwak is usually the most famous one) are the recurring characters in the National OI.

Now, out of curiosity, what are YOUR National OI's mascots or recurring characters? It's fine if your country doesn't have one :>.

(picture unrelated)