Joanna Heartburg is one of the main characters in Pinkland. While residing there, he takes on a more calm attitude, having to serve as the voice of reason to his brothers. He's extremely protective of Charles, whom he deeply cares for as his brother. His tone is more disdainful when dealing with individuals whom he has little respect towards, such as Injury.

He gets along well with Rayne. While he finds Devin somewhat irritating at times, he also considers him a good friend. He is incredibly close to Tetra, who he also has a small crush on.