When worn by a human, a Seru will grant the wearer great powers. Depending on the type of Seru equipped, these powers can include greatly enhanced strength, control over the elements, and even the ability to fly. With the strength of Seru, humans were able to build civilization and thrive on the bounty of their combined efforts. All Seru possess an elemental affinity which determines what type of attacks it will use in battle (noted by the icon displayed next to its name). This is useful in determining what abilities can be assimilated by a Ra-Seru (see below).