Candlehead and Rancis Fluggerbutter, AKA Birthday Butter, Candle Butter, and Peanut Butter Cupcake, is a couple made by Sugar Rush fans.
About the couple
It's speculated that Rancis and Candlehead are very close, as they hang around most of the time with Taffyta Muttonfudge. As a result, some fans think that Rancis and Candlehead may have had a relationship. Candlehead is sweet, and mellow enough to put up with Rancis' self-obsession, so the two probably get along splendidly even if as friends.
Some people view it as a one-sided crush, like Vanilla Swirl, or just as a friendship, and others see it as a mutual relationship.