The Announcer seems to be mature and reserved, often keeping calm and collected, partially because he is a robot. Despite his good nature, he does have moments of being unfair towards others, like not caring that he sold Dream Island to Leafy, and even hides this information from Bubble when she asks about it.
He's also shown to have a sense of humor when it's at the contestants' expense. For example, he laughed before dropping water balloons on the contestants in the ladder race