Mimi Teletubbies
Mi-Mi is the turquoise (light blue) Tiddlytubby. She has a bumpy shaped aerial.

When the Tiddlytubbies were first introduced in the episode Babies, Mi-Mi was only seen in the background sleeping. She wasn't officially introduced until the epsiode Tallest Shortest.

In Season 2, the Tiddlytubbies were given their own characteristics. Mi-Mi always likes to be first.