He is Aoi Kunieda's younger brother, and a friend of Beelzebub IV.
He is Aoi Kunieda's younger brother and she takes care of him. Aoi even changes her clothes and personality to protect Kota from the delinquents at her school who may prey on her brother. Kota gets mistaken as Aoi's son due to the parents at the park who cannot tell the difference.
Kota Kunieda, who is created by Ryuhei Tamura, has no information regarding any inspiration used to create him. He first appears in Beelzebub volume 2 and episode 7. His Japanese voice actress is Ayahi Takagaki.
He is a static character.
Due to Kota is a baby still, the personality is hard to get.
Kota is a baby boy who usually dressed with a hat that has bear/ or cat ears on it. Unlike Beelzebub, Kota has clothes on.
In episode 10, Oga tells Aoi Kunieda that Baby Beelzebub and Kota will make good friends because of a "spark." In that filler episode, Kota and Beel become good friends. However, in the manga, it is unknown if Kota and Beel has become friends.
He makes his first appearance in episode 7. He plays with Baby Beelzebub in the sand box and they wrestle, too. Kota beats Beelzebub in wrestling because Beelzebub is not attached to Oga.
Kota and Baby Beelzebub's relationship becomes a friendship in episode 10 when the two are playing (with a cat) in the daycare center against two other babies in a buiding blocks contest. After Kota tricks the babies to put Beelzebub's frog bomb on their block, Kota, kitty, and Baby Beelzebub run for cover. Most importantly, Kota shares a high five with Baby Beelzebub signaling the start of a great friendship.
Kota has no powers because he is an ordinary child unlike most characters in Beelzebub.