TV-Series
Description
Keith Green is a character from the anime Project ARMS, specifically appearing as a member of the Keith Series in The 2nd Chapter. He is a male clone created by the secret organization Egrigori, genetically modeled after the original Keith White and implanted with a powerful bio-weapon known as an ARMS.

On the surface, Keith Green presents himself as a courteous and civilized individual, but this appearance is deceptive. Beneath this veneer lies a cunning and ruthless personality; he is powerful and has demonstrated a cruel enjoyment in slaughtering his enemies, once orchestrating a deadly helicopter attack on fleeing refugees as if it were a symphony. Despite this vicious streak, he possesses a surprisingly soft heart in certain regards and is known to be arrogant and self-centered. Unlike some of his fellow clones, he acknowledges the other Keiths as his brothers and sisters, adopting the position of the youngest in the group.

His motivations become deeply personal after he is assigned to guard Katsumi Akagi, the girlfriend of the protagonist Ryo Takatsuki, while she is held captive at Carrion Fortress in the United States. During her imprisonment, Keith Green falls in love with her. This affection, however, is not entirely selfless, as he cannot truly understand her and harbors a deep hatred for Ryo, knowing that Ryo is always on her mind. His love for Katsumi ultimately becomes the driving force behind his actions, leading him to actively rebel against his own creators to ensure her safety.

In the story, Keith Green functions as an antagonist and a direct rival to Ryo Takatsuki. His primary role involves testing the strength of Ryo and his ARMS, Jabberwock, whom he severely wounds in a battle in the Grand Canyon using his spatial abilities. His most significant act, however, is one of sacrifice. When Keith Black threatens to harm Katsumi, Green transforms into his monstrous ARMS form to protect her, begging her not to look at him in his terrifying state. In the ensuing conflict, Keith Black fatally wounds him. With his last moments, he uses his power to teleport Ryo directly to Katsumi, acknowledging with his final words that there is only room for Ryo in her heart.

Throughout the series, Keith Green does not experience a major shift in morality, but his allegiance changes drastically. He evolves from a loyal operative of Egrigori into a desperate individual willing to defy his own kind out of love. His character arc is a tragic one, defined by his unrequited feelings and his final act of redemption, sacrificing his life for the woman he loves and the man she loves.

Keith Green possesses remarkable abilities derived from his ARMS, known as the Cheshire Cat, named after the character from Alice in Wonderland. This ARMS grants him the power to manipulate space and time. His capabilities include teleportation, flight, and the creation of invisible spatial tears that can slice through any surface, which he used to grievously wound the Jabberwock. His ultimate technique, called Ansara or the Answerer, allows him to create a dense network of spatial rips from his tail blades, capable of cutting anything within a 100-foot radius. When he fully manifests his ARMS, he transforms into a large, monstrous, feline-like beast with three tails and rows of spikes on its back, resembling a tiger.