Kouki Tsubasa

Kouki (Koki) is one of the modified (seemingly) human individuals with the power to turn into a Digimon through the process of Bio-Hybrid Digivolution. He is the supposed leader of the Bio-Hybrids. He first appeared to defeat Akihiro Kurata from Keenan Crier and Crowmon. He then appeared before the DATS group, where he clashed fists with Marcus Damon which ignited his D.N.A. - an act that alerted everyone to the fact that he was no mere human. However, both he and his comrades' attacks were halted by Commander Richard Sampson and Kudamon. In the epilogue (5 years later), Kouki made an appearance as a motorcyclist without a helmet, pursuited by Yoshino Fujieda's police wagon. His Digivice is Blue/Gray.

BioThunderbirdmon
BioThunderbirdmon (BioThunderbirmon) is Kouki's first Digimon form, based on the Armor Digimon Thunderbirdmon.

Attacks
 * Thunder Storm: Releases a wave of thunder and electricity from his wings.

BioDarkdramon
BioDarkdramon is BioThunderbirdmon's next stage, based on Darkdramon, which Kouki assumes through "Hyper Bio Extra Evoution, which he gained after having his body combined with the data of a Mega Digimon. He fought ShineGreymon in the real world in order to keep him from interfering with Kurata's plans. He was defeated and reverted to Kouki and a Digi-Egg after ShineGreymon impaled him through the chest with the GeoGrey Sword.

Attacks
 * Cyber Lance: Attacks with the lance built into his arm.
 * Dark Roar: Creates an explosive ball of dark matter, and directs it at his enemy.