Mike Charat is a character originally introduced as a main figure in Panyo Panyo Di Gi Charat who later returns as a supporting character in Di Gi Charat Nyo. She is a childhood friend of Dejiko, Puchiko, and Rinna, and hails from the same planet as them. She lives with her parents above a fish shop, a detail that ties directly into her background. Her father is a fisherman and runs the family store, and Mike herself has developed considerable skill in fishing as a result. She is frequently seen searching for a legendary fishing rod, a goal that reflects her adventurous and determined side.

In terms of personality, Mike is described as a tomboy. She is bold, active, and not afraid to take risks. She can be stubborn and is quick to anger, which sometimes leads to quarrels with Dejiko. Despite this fiery streak, she remains a loyal friend and is part of the core group of companions. Her speech pattern is distinctive, as she ends her sentences with mya, a trait shared with her parents. One noted dislike is sea slugs, a small quirk that adds texture to her character.

Her role in the story shifts from a main character in the earlier series to a supporting presence in Di Gi Charat Nyo, where she continues to interact with the main cast as a friend and occasional source of conflict or comic relief. Her motivations center on her love of fishing and her search for the legendary rod, as well as maintaining her friendships. Her key relationships include Dejiko, with whom she has a spirited dynamic that can veer into arguments, and the broader circle of Puchiko and Rinna, whom she has known since childhood.

In terms of development, Mike retains her core traits across appearances, with her tomboyish and adventurous nature remaining consistent. Her notable abilities revolve around her fishing talent, which is both a practical skill and a defining personal pursuit. She has short red hair and purple eyes, and her appearance is often complemented by cat ears and a tail, consistent with the catgirl aesthetic of the series.