Ace London is one of Baloo's greatest rivals. Because of his expert flying skills he works as a test pilot. His ego is huge and often behaves cockily as he speaks of himself as the 'bravest, fastest, handsomest airman that ever streaked across mother nature's blue roof'. He's always admired by the public and usually responds that they 'got that right'. Though he's not infallible as he has a problem remembering things.

Ace London shows no fear. He doesn't even hesitate to take back secret testing objects by using force on civilians. Being delegated to lower tasks weakens his confidence drastically.