Lyon Arkland, the CEO of ZAIA U.S.A aka Kamen Rider Zaia. He is the antagonist of Zero-One Others: Kamen Rider MetsubouJinrai, a self-righteous and cunning businessman who sought to profit off of "justice" by igniting chaos.

His plan was to further maximize ZAIA's sales by recreating the past evil of MetsubouJinrai.net to fight his Sold Magia. Arkland states that previous successors of the Ark were able to overcome their malice, since having hearts makes them susceptible to doubts. He concludes that believing in one's own justice will give birth to a never-ending battle.

During an A.I.M.S. press conference conducted by Yua Yaiba, Arkland arrives and accuses MetsubouJinrai.net of being a terrorist organization and randomly attacking the ZAIA Enterprise building while pointing out that the agency has MetsubouJinrai employees.

While Yua attempts to defend Naki's employment, a publicly broadcast declaration by Jin, Ikazuchi, and Naki interrupts her. They announce that they will attack ZAIA Japan headquarters and anyone opposing them will be eliminated. As Yua attempts to deploy A.I.M.S., Japan's Ministry of Defense., Shigeru Daimonji, informs her that they instead allowed Arkland to demo his soldiers to combat MetsubouJinrai as a way to not sour international relations.

In the end Lyon got killed by Kamen Rider MetsubouJinrai but his plan ? His plan succeed of making MetsubouJinrai.net a new threat to society.

Yua reports back to Daimonji that ZAIA Japan has been destroyed, with the Secretary himself revealing that the government was going to reject ZAIA's weapons anyway. With his beliefs in humanity and not in A.I., he personally tells Yua to eliminate Kamen Rider MetsubouJinrai as Kamen Rider Valkyrie.