Jean Couronne XIV

Jean Couronne XIV is the long deceased human partner of Crown. When the two EM Wave Change, they become Crown Thunder.

MegaMan Star Force
After beating the game and going back to Earth, while traveling through the Scrapyard, Geo and Omega-Xis will find a ghost who will tell them he died long ago, but the EM Waves made him a visible ghost, and that he can EM Wave Change with an EM Being named Crown, into Crown Thunder. He tells them to meet him at the Junkyard EM Wave Road.

He appears EM Wave Changed in the Junkyard and challenges MegaMan to a battle.

MegaMan Star Force
Jean and Crown haunt an abandoned amusement park. They are seemingly invincible, because no attacks could hurt them. But, it is revealed that striking the amusement park itself would cause damage to them because Jean's soul was linked to it.

Crown can later take on Jean's form while traveling in the human world, but has an arrow through his head.