Joe was found on the outskirts of Yosyonke and has been taken care of by a woman named Maria. Maria's daughter considers him to be her father.

MegaMan and Roll follow Joe into the nearby Calinca Mine because of a connection between him and Roll's missing parents. Joe has the plans to build a drop ship for landing on Forbidden Island safely, and the drop ship was supposed to have originally been designed by Roll's father...

Joe seems to be in bad physical condition, ready to pass out or collapse at any time. He has little to say, and to make matters worse his memory is hazy.