Kako

Kako was Barney's girlfriend when he was in Be-Sharps.

History
When Barney was a member in Be-Sharps he get a girlfriend, Kako. They created the song "Number 8".

She took a citizenship test with Apu, Luigi and Moe among others.

Behind the Laughter

 * Kako is an obvious parody of.
 * Kako's name wasn't revealed in the episode, it was revealed in Simpsons World the Ultimate Episode Guide: Seasons 1-20.