Personality: 

Unlike many of Eggman's robots, Orbot is not a mindless drone and possesses both a personality and emotions of his own. Orbot is one who looks at the bright side of things, especially for the sake of his boss when he is in a foul mood. He is also shown to be lazy.

Orbot possesses a sense of spiteful sarcasm, and likes to rebuke Eggman about his previous failures, having once asked Eggman if he wanted to review "a list of eldritch creatures [he'd] like to resurrect and then lose control over", which is a clear reference to the doctor's past failures in this field.

By his own admission, Orbot appears to suffer from anxiety. As such, he needs to take some time off for reassuring activities, such as arranging cables in alphabetical order. He is also smarter and more perceptive than Cubot, whom he has to explain some things to.

Voice Reference: https://youtu.be/-ik_ZAAt5PQ?si=WXIAulAlQltD73ka