Hollow

Hollow or Empty is a being that doesn't fuse with anyone. He's hollow inside that's why he's called Hollow. Hollow is Lady Vega's assistant, and a big help when it comes to fighting. Hollow is said to resemble Lady Vega's long time husband and hopes to use the power of Le Mu (Ra Mu) to revive him. Hollow's only real match is Rogue (Solo), the last citizen of Mu. Hollow is almost impossible to beat if he's hooked up to an energy source. If not, he doesn't have a chance. Hollow is defeated at the hands of Geo Stelar (Subaru Hoshiwawa) when he turns into Megaman (Rockman) with the help of Omega-Xis (War-Rock) along with the help of the three OOParts allowing him to become Tribe King.