Semicircle

Semicircle is the official host of Million Champs. He is a host who cares about most contestants and thinks about most of the challenges.

TRIVIA:
As seen in One Can of Shaving Cream Can Cause a Big Problem (Part 2), Semicircle has a mini beard.

In The 2nd Start and Leave (Part 1), Semicircle now has two rivals. Square and Perfume.