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Description
Haruhiko Mitamura is a character from the 2005 film. He is a young man who has been a long-term patient at Midoriyama General Hospital. His time in the hospital has been marked by loneliness, as he has no visitors and feels abandoned, which drives him to a state of deep pessimism and even desperation.

His personality changes dramatically when he meets Miyoko Harada, a fellow patient who is also coping with a serious illness. Through their friendship, which quickly deepens into a romantic relationship, he finds a new sense of purpose and a reason to live. His motivation becomes entirely centered on Miyoko, and his greatest desire is to be with her and see her recover. This love is the driving force behind his later actions.

The role Haruhiko plays in the story is that of a tragic antagonist. The hospital where he and Miyoko stay is secretly a front for Shocker, a terrorist organization that transforms humans into cyborg soldiers. Shocker offers the couple a chance for a new life, promising to cure Miyoko’s illness. In exchange, Haruhiko agrees to be transformed into Cobra, a special-class cyborg soldier. His identity as Cobra is hidden for much of the film, revealed to the audience only near the climax. As Cobra, he is tasked with eliminating Shocker’s enemies, including the two Kamen Riders, whom he confronts alongside his partner, Snake, who is the cyborg form of Miyoko Harada.

The most significant relationship in his life is with Miyoko Harada. Their bond is the central pillar of his character arc. The promise of saving her is what leads him to accept becoming a monster. This relationship also defines his key connection to the antagonists: Shocker manipulates his love for Miyoko to recruit and control him.

His development is a tragic downward spiral from a hopeful young lover into a brainwashed cyborg soldier. After being mortally wounded in battle by Kamen Rider 1, he reverts to his human form. As he lies dying, he crawls to Miyoko, who has also been fatally injured. In his final act, he takes a single gerbera flower that he had planted outside the hospital long ago and places it on her lifeless body, showing that his human memories and love survived despite his transformation. He then dies beside her.

As Cobra, Haruhiko possesses notable abilities that come from his cybernetic enhancement. He wears a special reinforced suit and a snake-like mask. His physical abilities include superhuman strength and durability, enough to initially overpower both Kamen Riders in hand-to-hand combat. He also has an olfactory amplification device and climbing capabilities. A distinct feature is the tentacle on the back of his head, which is removable and can be used by his partner, Snake, as a whip.