Robbie is a thoughtful, but enthusiastic character with a wild personality. He is a well known researcher and scientist and is very proud of his work, however is a bit fearful of making his colleague(Purah) cross with him. He's accompanied in-game with a lot of electric guitar sounds, so...do with that info what you will. Jack Black was described as an inspiration for the OG voice as the words Robbie annunciates and choose to put emphasis on in a similar to the actor. The wiki describes him as a "rebel without a cause" type, and honestly that's a pretty good description.