Sadida (also known as Sadida's Shoe) is a class.
Sadidas are summoners who poison the lives of their enemies. Taming brambles to form horrifying weapons, crafting war and healing dolls - these are a Sadida's bread and butter.
Sadida spelled backwards is Adidas, a major sports equipment manufacturer. Amongst other things they produce sports footwear, which refers to the class name, Sadida's shoes.