Hakaider

Hakaider is a major villian of the Kikaider series, an android created by Doctor Den Komyoji. He is known for his whistling when he makes an appearance.

History
Considered as a "younger brother" to Jiro, Kikaider, Saburo was one of the androids Komyoji was forced to make by Professor Gill. But unlike the other DARK androids, Saburo is a cyborg in the retrospect that Dr. Komyoji's brain was surgically transplanted into him as Gill's ace against Jiro. However, through superior to Kikaider, Hakaider needs periodic blood transfusions from Dr. Komyoji's body. He eventually loses Kyomoji's brain upon his defeat by DARK's White-Bone Flying Squirrel.

Anime
Saburo first makes himself known to Jiro when he kills the DARK android Gold Bat. Later, when Jiro accompanies Mitsuko and Masaru to their Mother's home town, Saburo formally introduces himself before using his whistle to control Jiro and have him overload from not submitting to the GEMINI system. But when that failed, Hakaider decides to kill Kikaider the old fashioned way before Dr. Komyoji's brain overrides him. By that time he regains control, Hakaider is betrayed by Gill who has the other Hakaider drones gun him down with Komyoji's brain undamaged as Mitsuki takes it. In his final moments, the headless Hakaider strangles Gill to keep him from escaping as DARK headquarters collapse around them.

Trivia

 * In an interview, Star Wars creator George Lucas mentioned Hakaider as an inspiration in creating Darth Vader.