Phantom (EM being)

Hyde (ハイド) and Phantom (ファントム) are two characters from the MegaMan Star Force series that become Dark Phantom (Phantom Black in Japan) when combined.

Hyde
Hyde is the owner of Phantom. He is in charge of distributing UMAs through summoning them with his Ancient Star Carrier. Because Rich Dotcom already had an Ancient Star Carrier and UMA (Yeti), Hyde didn't need to give him one. Others need to be given an Ancient Star Carrier with the UMA already in there, so they could EM Wave Change right off the bat.

Phantom
Phantom is a UMA that Hyde uses. It was given to him by Dr. Vega, and when it merges with Hyde, they turn into Dark Phantom.