Raven first appeared in episode 12 of Chaotic Century, "The Black Organoid." In the episode, an Organoid and a kid had been reported destroying an entire batallion of sleeper Guysaks.
Van Flyheight, Fiona and the Organoid, Zeke, are initially mistaken for the culprits, and are pursued by the Republican Army. Raven, however, rescued them. Van and Fiona followed Raven to a plateau, pressing him for information, which he refused to divulge. Irvine showed up, warning Van that Raven was the one who'd been killing Zoids. Raven announced that he despised Zoids, and his Organoid, Shadow, as well as his Zoid, the Zaber Fang, step out from behind the plateau. Van then watched in horror as Raven destroyed an entire fleet of Godos which were sent after him. Enraged, Van challenged Raven with his Shield Liger, but lost quickly and easily to Raven's superior skill.
Van and Raven would continue to have skirmishes in several following episodes. The next battle left Zeke in a weakened state. While Van was trying to help Zeke recover, Irvine challenged Raven to a battle with a new weapon but Raven, along Shadow, defeated him with ease as well. He then viewed Major Schubaltz's battle against Captain Herman's Gojulas. Seeing Herman collapsing the Gojulas, Raven denounced Herman's abilities and commented that if he were piloting the Gojulas, no one would have escaped.
During Prozen's invasion, Raven and Van battled again; this time Van finally managed to draw with Raven until he had to leave due to Prozen's invasion. Raven, angry with Van "running away," tracked down Fiona and Moonbay atop Mt. Osa and he battled Van once again; this time Van won. Raven's loss came about as a result of his Zaber Fang melting as he recklessly tried to force it through Van's E-shield, which he almost succeed in doing. Following this defeat, Raven deduced that he needed a more powerful Zoid.
Raven would reappear later with his new and more powerful Zoid: the Geno Saurer (initially mistaken by the characters as a Death Saurer). Involved in a conspiracy by Prozen to abduct the crown Prince Rudolph, Raven found that Rudolph was with Van and the two had yet another rematch, which resulted in the destruction of Van's Shield Liger and Zeke's near death experience. Raven would continue to use his Geno Saurer in following episodes to carry out Prozen's bidding: killing mass amounts of Zoids and taking their Cores for use in the Death Saurer revival project.
Raven's final appearance in Chaotic Century was when he fought Van's new Blade Liger. The two battled fiercely, which ended when Van shoved one of the Blade Liger's Laser Blades into the Geno Saurer's CPC emitter, destroying it. Raven escaped a fiery death thanks to the last minute action of his Organoid, Shadow.
