The lake guardians, sometimes referred to as the lake trio or spirit trio, is a term used to describe the legendary trio residing in the three lakes of Sinnoh: Uxie, Mesprit, and Azelf. They are meant to represent knowledge, emotion, and willpower, respectively. They are based on the Imperial Regalia of Japan: the Yata no Kagami (wisdom), Yasakani no Magatama (benevolence), and Kusanagi (valor). Parts of their names come from fantasy creatures: pixies, sprites and elves, respectively. The other parts of their names come from pronouns: you (Uxie), me (Mesprit), and us (Azelf).