Killjoy Juju is the Juju of non-stop fun and parties. She is married to Party Juju and is constantly stopping his wild parties. The reason their relationship works out so well is because Party Juju thinks it's hot how she can stop a party like nobody's buisness. Killjoy gets upset that people only call her to stop parties and never invite her to them. She stops parties by screaming "Party's over!".