Kusanagi Motoko

Kusanagi Motoko is a Major with a commanding presence when on assignment. Among the members of Section 9, she is usually the one Chief Aramaki Daisuke asks to accompany him on official and off the record business. Kusanagi underwent cyberization when she was very young and had trouble adapting to the use of her body, resulting to inadvertently breaking one of her favorite dolls. She wears a wrist watch as proof of her past.

Lambo

A cow suit-clad, 5-year-old assassin from Italy, Lambo is affiliated with the Bovino Familia. He has a huge afro with horns on his head in which he stores a variety of items in including snacks and weapons. Despite being a hitman, he lacks the emotional maturity and discipline that Reborn has and is also considered to be a conceited crybaby.

Kurosaki Ichigo

While training under Urahara Kisuke to become a Soul Reaper with his own powers, Kurosaki Ichigo  partially becomes a hollow, the same evil spirit that he is fighting to protect people from. This leaves him with an insane inner hollow spirit that tries to take control of his body to fight. Within his inner world, the hollow mirrors Ichigo’s appearance, usually with pale white skin and hair, revealing black eyes with golden pupils.

Kiryuu Ichiru

Zero's younger identical twin brother, Ichiru failed to become a Vampire Hunter due to his weak body and lack of hunter talents. He was believed to have been killed by the pure-blood vampire, Hio Shizuka, but he returned to Zero’s side 4 years later, revealing that he had willingly become Shizuka’s servant. She had given him her blood to cure his chronic illness in exchange for his loyalty, but she did not turn him into a vampire.

Kasane Teto

I have this nagging feeling that she may be another fanmade Vocaloid character like Yowane Haku, but I've gone through a couple of Vocaloid  fansites with no luck in finding out who she could be! I wish we could at least see what the number on her right arm is, then I’d have a better clue!

If I had to guess though, I’d think she’s probably another version of Miku or Meiko.

Kaname Madoka

A 14-year-old girl who comes from a loving family, Kaname Madoka's life changes when she encounters the Puella Magi, Akemi Homura, and the familiar Kyubey, who offers to transform her into a Puella Magi. She sees herself as someone who does not have any special qualities or talents, and after seeing Tomoe Mami  fight against witches, Madoka decided she wanted to be a Puella Magi as well. She is kind, gentle, and does not like to fight, wishing instead for everyone to get along.

Kamiya Kaoru and Takani Megumi

Kaoru first met Megumi when Kenshin and Sanosuke brought her home from the gambling house where they were playing dice. She was furious that Kenshin  brought a female stranger into her home and Megumi sensed that Kaoru was actually jealous. Megumi then plays the flirt and makes several advances towards Kenshin, which he handles nervously and refrains from submitting to. Megumi successfully makes Kaoru jealous at just about anything throughout the series.