Fluo is a purple alien who gets stuck on Earth in Medieval Times. She is able to blend in rather well, save for her purple skin, and quickly begins working for a young lord named Cassius. She becomes his bodyguard. Cassius has two younger brothers, Adrian and Tybalt, who Fluo gets to know pretty quickly. The proper pronunciation of her name is Flo-o, but since her human companions struggled to pronounce that, she adopted the nickname Flo.