Austin is described as the "new kangaroo on the block," and does not know the other characters very well yet. He is somewhat hesitant to express his opinions, and slow to take the lead. Austin is often left out and rarely takes the role of the lead character. When he overcomes his shy feeling, he gets the respect he deserves. Austin is sweet, kind, and has a big heart. Throughout his adventures, he frequently takes the role of a humble servant or faithful assistant, putting his friends' needs ahead of his own and helping them in any way he can. He is not one to ask for recognition, but even so, he receives a lot of love and support from his friends for all that he does for them.
In season one, Austin's voice was somewhat raspy, but from season two and onward, this feature disappeared. Austin's shy trait also seems to disappear in the last two seasons. As the series progresses, Austin takes the role of more antagonists, such as Mayor Stinkypants and the Gloom Meister.
Austin is tall and his entire body is purple. He has a light blue shirt with a yellow line in the middle. He wears blue pants that are rolled up. His nose is dark purple and his eyebrows are dark purple. He has long ears with dark centers on the top of his head. Austin has a tail which comes out of the center of the seat of his shorts and trails on the ground.