Pluto

The Black Sun is the main antagonist of the anime and the manga series, Metal Fight Beyblade 4D. His Beyblade may be Nemesis.

Appearance
The Black Sun wears a grey cloak that covers most of his body inculding his face. All that can be made out from his face is his nose an his eyes although they are covered by his blue goggles.

Information
Not much is known about The Black Sun except that a great evil is trying to revive The Black Sun and Nemesis by using the unknown power of the Star Fragment and is a part of a evil team.

Metal Fight Beyblade 4D
The Black Sun gave directions to his aquaintance, Johannes to find an astronomer, named Yuki Mizusawa.

Beyblade

 * Unknown (Possibly Nemesis)