Popuko is one of the two main characters from Pop Team Epic, a yonkoma series created by bkub that follows the surreal adventures of the two schoolgirls Popuko and Pipimi. Although it is never specified whether Popuko is related to Pipimi or not, the two are very close and share a sister-like bond.

Popuko is someone who is quick to anger and has psychopathic tendencies, often lashing out at other people with little to no provocation and having an unexplained distaste towards catering staff, a contrast to Pipimi's calmer, more levelheaded personality; she also has an excessive habit of using profanities in her speech, especially when angry. Like Pipimi, Popuko appears to have an interest in video games, anime and J-pop, as she frequently makes references to them.