Nebula Grey is the embodiment of Dark Power and the Inner Darkness of Human and NetNavis. Dr. Regal planned on using Nebula Grey's power in conjunction with the SoulNet to link all of the souls on Earth together to taint them with evil. MegaMan.EXE eventually confronts Nebula Grey with the help of Team Protoman or Team Colonel depending on the version and defeats him. However, Nebula Grey attempts to taint MegaMan.EXE with evil, only to be repelled by Lan's link with his brother along with the latter's use of his full power to wipe Grey from the Net. Even after this, Grey attempted to return one last time to attack an exhausted Mega Man, only to be stopped by the combined efforts of Mega Man's friends before being annihilated once and for all.