Red Sun

The Red Sun is one of the two Suns around which Tarris orbits. It is smaller and dimmer than the Golden Sun, but much more active as it frequently experiences outburts in brightness. From the surface of Tarris, it appears in a fiery orange color.

Trivia
In our universe, the Red Sun would correspond to an M-type dwarf star, main sequence stars with surface temperatures below 3600K, and masses below 0.5 Solar masses. They are the most abundant type of star in the cosmos, and also very prone to stellar activity, including strong flare eruptions. Proxima Centauri is an example of such a flare star.