Canti is a medical robot with what looks like a television set for a head. He was manufactured by Medical Mechanica, but taken over by Atomsk as a way to escape MM. After having his head broken by Haruko he is recruited by her as an assistant, however he proves to be no good for much other than washing dishes and fetching drinks for the family. It is later revealed that Atomsk can manifest through him, with Naota being the catalyst. Atomsk&#039;s symbol appears on Canti&#039;s screen when he absorbs Naota; the symbol is a corruption of the kanji characters for &quot;adult&quot; (��l). This symbol also appears on him when Naota &quot;swings the bat&quot; in Full Swing and when Canti is absorbed by the terminal core in FLCLimax. 

The emotions of Canti are very human-like, despite his looks. He is embarrassed about his broken head (where Haruko hit him) and is looking for the pieces to glue back together in episode two. He wears the box on the back of his head for the same reason- shame. He is also extremely polite, extending a helping hand to Lieutenant Kitsurubami even after she attempted to destroy him.   

Canti also dons a halo and fake wings (which Haruko was wearing in early episode two). Mamimi is convinced that Canti is an angel. She calls him Lord Canti after &quot;The God of Black Flames&quot; in a video game she plays. The rest of the cast call him by this title throughout the rest of the series. Apparently, he can also eat curry with his &quot;mouth,&quot; but it is never really explained how.

Naota is a detached sixth grader afflicted by the pangs of puberty. He's fooling around with his brother's ex-girlfriend when a crazed girl on a motor scooter runs him over, brains him with a bass guitar, and moves into his house. This pink-haired girl, Haruko - who claims she's an alien - hurls Naota into the middle of a mega-corporation's secret agenda. Oh, and now giant battling robots shoot from his skull. Mix in mind-bending animation and tunes that echo through your cerebellum to top off the trip that will have you falling hard for FLCL. 
 
(Source: Funimation)

Naota is a normal Japanese 6th grade boy but when his older brother leaves for America to play baseball, his brother leaves his 17 year old girlfriend Mamimi behind. Mamimi is sending mixed signals and advances to Naota, and he doesn't know what to do about her. But to make matters worse, Naota's world is totally turned upside down when he is run over by a woman on a Vespa. During their first encounter, she hits him over the head with her guitar, which then causes a horn to grow out of his forehead. She calls herself "Haruko" and her presence changes Naota's life to even further insanity. 
 
(Source: Anime News Network)

Many years have passed since Naota and Haruhara Haruko shared their adventure together. Meanwhile, the war between the two entities known as Medical Mechanica and Fraternity rages across the galaxy. Enter Hidomi, a young teenaged girl who believes there is nothing amazing to expect from her average life, until one day when a new teacher named Haruko arrives at her school. Soon enough, Medical Mechanica is attacking her town and Hidomi discovers a secret within her that could save everyone, a secret that only Haruko can unlock. 
But why did Haruko return to Earth? 
What happened to her Rickenbacker 4001 she left with Naota? 
And where did the human-type robot ‘Canti’ go? 
(Source: Adult Swim)