Dan Kuso

Dan Kuso was the first one who was captured and put in the DNA transmittor. He is the most fearsome battler of gundalia. His partner bakugan is a Gundalian Dragonoid. After his transformation, he had a very fears battle with Shun. Dan won and delivered his old friend to Kazarina, who put Shun in a capsule from the machine. Dan is the emperors assasin, tracing and eleminating the emperors opponents.

In a battle against the human Kane, Drago gets seriously injured and is not capable of battling anymore. Because of that, Dan gives Drago to Kazarina for experiments. While Dan is trying to replace his 'useless' dragonoid, Kazarina is doing experiments on Drago. In one of the experments, Drago bonds with the silent orb and evolves in Darkus Dragonoid.