Roboto

Roboto is a recurring character in the Mia Collection series.

Appearance
Roboto is a mostly blue spherical robot. He has a gray antenna sticking out of his head, and two dark gray arms and hands that he uses to support himself since he has no legs.

Mia's Math Adventure: Just in Time!
Mia first encounters Roboto in the inventor's cave. He gives Mia instructions for finding the key to the time machine. At the very end of the game, he pops out of Mia's backpack to wave goodbye to the player.