5pb. is a supporting character in the Hyperdimension Neptunia series. She is the number one idol in Leanbox, the hostess for Hi-Five Radio♪, and cousins with MAGES. She is very energetic and confident on the stage, but in a more private setting, she grows self-conscious and shy, after arguing with herself to make decisions. Her name is also a reference to 5pb. Records, a Japanese video game manufacturer and record label for video game and anime music.
5pb. appears in All Star Smashers as a Support Spirit, as an advanced class, where you must fight Billy Slaven in the Talk Room to obtain her, while he is aided by 3 other random characters. When fighting Billy, he will mostly favour using his Up-B move, and he is much stronger than usual as long as his allies are alive.