Murao Mima has created a robot daughter named Key, but after raising her for a very short time, Mima dies, leaving behind cryptic messages telling Key how she can become human. Key must struggle alone to learn the harsh lessons of life and search for the 'key' to her own dream: the power of 30,000 friends to make her a real human girl.
Among the garbage dumped down from the mysterious aerial city of Zalem, a new life is found. Restored by a brilliant cyberneticist, a young girl named Gally struggles to find her own place in the world, to learn the extent of her own deadly abilities and to discover that which makes her truly human: love.
Key the Metal Idol and Battle Angel Alita are similar in both artistic style as well as story theme, despite being in drastically different settings. Both have to do with a robotic girl struggling to find their meaning in the world and the relationships they have with the people around them (and especially the father-daughter-like relationships with their respective creators.) Though Alita is more of a femme fatale-type character, the stories still have many parallels and would definitely appeal to eachother's fan-bases.
When popular pop idol Mima decided to retire from her group, Cham, and become an actress, she had no idea that one person's obsession would soon spiral out of control. With death threats, letter bombs and a forged website which details her every move, Mima finds herself slowly becoming trapped in a nightmare she can't seem to escape. With murders piling up and her mental state slowly degrading, can she discover who the culprit is, before she becomes the next victim?
Both series are about pop-idols and as a result, you'd never expect either one to be incredibly twisted, violent, and dark. If you liked the unexpected delight of a sick and twisted show that seems all butterflies and rainbows based on the plot synopsis, check out the other one.
Both Key and Perfect Blue explore the dark side of fame, and the way that stars (especially female stars) are exploited by their producers. But each anime portrays fans differently. In Key, idols share a spiritual bond with their fans. In Perfect Blue, the fans are just as creepy and smothering as the producers. Both portrayals are two sides of the same coin.
"I have only abandoned my body, I still live here" - are the words emailed to friends of Chisa, several days after her death by suicide. As Lain delves deeper into the world of the "Wired" (also known as the internet), the line between it and reality becomes more and more unclear. Close the world, open the nExt.
I'm surprised that Key doesn't get mentioned more with regards to Lain. Both are uncharacteristically dark series about characters who are forced to decide what's real and what isn't, and to eventually confront a secret about their own existences as well. They both also have fantastic stories that will leave you trying to pick apart exactly what you just saw. Key is a bit darker, but makes up for it by being more accessible.
Both make you wonder who exactly is the main character, or what? The personalities of Lain and Key are similar, and they both have an air of mystery and are very techological anime. Another similarity is that is both, they have an upbeat friend that they end up dragging into their mess and causing them emotional and psychological distubances and eventually much worse than that.
Hazama is a private detective, who becomes fatally wounded in a run-of-the-mill case. In order to survive, Hazama is tranformed into the legendary cyborg 8Man -- to put an end to the cybernetically-enhanced criminals' wave of crime. But as the death count increases, Hazama soon begins to question how much of his real self is left, and if the emotionless 8Man he becomes is really in control...
After a terrible accident occurred at the lab, Professor Komyouji vanished - and with him, the hopes for completing his most recent creation: Jiro, a robot with a malfunctioning conscience circuit. With no memory of who he is or what is his purpose, Jiro is mentally lost; his saving grace is the Professor's daughter, Mitsuko, who - though afraid of Jiro - pledges to help him either repair his circuit or destroy him if his emotions become out of control. Unfortunately for Jiro, there is a far more sinister danger at hand: Professor Gill and the evil organization Dark are sending countless robots to destroy him, forcing Jiro to transform into his full cyborg self, Kikaider. With the help of Mitsuko, Jiro must ward off the forces of Dark while trying to discover what it means to be human...
I enjoyed Key considerably more than Kikaider, but both focus on a similar concept: a robot who has a soul (or wants to have one). If you like watching a robot come to terms with their own humanity, you'd enjoy either of these titles. Expect Key to be a lot darker, with a lot more character development.
Both animes have as a main character a robot who is searching to become a human, and they both follow their adventures in seeking the imposible to make it possible