The Rato Tribe (ラト族, Rato-zoku) is one of the 12 non-human races. In battle, they are widely regarded by the world to be the most powerful of the 13 races. However, they are far weaker than the Tsuta Tribe.
In ordinary life, their appearance resembles humans, the only notable difference being stripes on their bodies. However, this appears to be a suppressed state; when in battle, they can transform, gaining larger musculature and claws, with stripes covering their entire body.
A Rato Tribe town lies west of the Loosa Kings' Graveyard. There, they have taken in the Photon Carrier boy Noish. The tribe exterminate Dragons in what they call Dragonbanes (竜退治 (ドラゴンベイン), Ryū Taiji (Doragonbein)), and they keep all the Dragons barricaded in an area known as the Sacrificial Fort (贄の砦, Nie no Toride). All Rato males go on Dragonbanes and females hunt for food. However, there are two females among the Nines, the elite Dragonbane group, Deodora and Luida. The Rato sustain themselves by selling parts of Dragon corpses, which are extremely valuable. The Rato Tribe have battled with Dragons and their followers, the Tsuta Tribe, since ancient times.
The Rato Tribe's fighting energy Koki (虎気) is the only known thing that can harm Dragons. Their fights against Dragons are at such a speed that only the top 4 or 5 of the Lost 11 Photon Carriers would be able to keep up. Koki is a bare-handed fighting style that can pierce the Dragons' hard scales.
- "Rato" (ラト) back-to-front is "Tora" (トラ, 虎), which means "tiger".