Oni-Be is one of the characters from Pop'n Music 13 CARNIVAL.
Hyaa~hyuyo~. Aahahahahaa~. ...Kopo!
Oni-Be appears to be a ghostly devil who wears a gray mask with white horns that has an upside down face. He has a silver marking on his chest.
His 2P palette gives him a blue complexion, his mask is now white and the symbol on his chest and his horns become magenta. This palette is later confirmed in Mixtural from ee'MALL in Pop'n Music 14 FEVER!, and Neji Rock, from ee'MALL 2nd Avenue in Pop'n Music 15 ADVENTURE.
Oni-Be's name comes from Onibi (鬼火), a ghostly devil creature in Japanese folklore.