Mi is a baby penguin Cocotama who, along with Tsu and Ki, was born from a set of cherished toy blocks. These three are collectively referred to as the Toy Block Gods. Mi's defining personality trait is a tendency to cry, which distinguishes them from Tsu, who enjoys laughing, and Ki, who is prone to anger. As a Cocotama, Mi is a small god born from an object that was loved and cared for, and their primary role in the story is that of a minor supporting character. Mi's key relationships are with their triplet siblings Tsu and Ki, and together they appear in the series as a group. There is limited information about Mi's individual motivations, character development, or any notable abilities beyond their emotional disposition.