Stone Boy was one of the founding members of the Legion of Substitute Heroes, and served with distinction with them until Polar Boy disbanded that group.
Stone Boy is a Sagittarius. If his actions reflect reality, not the idealized image he wants tthem to reflect, he is among the multitudes. Dealing in reality is the only way to get closer to the person he wants to be.
Is it a bit ironic that Stone Boy shares his birthday with creative genius Keith Giffen? Here are a few instances where the two characters met...!