- For the political body that appears in the comics published by IDW Publishing, see Sol Empire (IDW).
Not much has been revealed about the Sol Empire. Despite being called an empire, it is referred to as a "kingdom" and is ruled by a royal family. This family rules from a castle and deals with public affairs. They also safeguard the Jeweled Scepter, a powerful ancient treasure of the Sol Empire. It is also the duty of the Sol Empire's princess to protect the Sol Emeralds, which are relics of nearly unlimited power.
Sonic Rush series
In Sonic Rush, the Sol Empire's Sol Emeralds got stolen by Dr. Eggman and brought to Sonic's world. Fortunately, Blaze got them back before the Sol Emeralds' absence led to the destruction of the dimension.
Sonic Rush Adventure
In Sonic Rush Adventure, the Sol Empire had its priced Jeweled Scepter retrieved from Captain Whisker and his crew, only for it to be stolen again by Dr. Eggman and Eggman Nega. When the villains later harnessed the Power of the Stars with the scepter, Eggman Nega threatened to destroy the Sol Empire with that power. Fortunately, he was stopped by Sonic and Blaze.
In other media
In the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing, the Sol Empire is a kingdom on Blaze's world, ruled by Blaze. Its past is virtually identical to its game counterpart's, up until after the events of Sonic Forces.
- ソニック委員会・ザ・ムービー on Twitter (Japanese). Twitter. Sega (23 November 2020). Archived from the original on 23 November 2020.
- Sonic Team, Dimps (14 September 2007). Sonic Rush Adventure. Nintendo DS. Sega. Area/Level: Deep Core. "Eggman Nega: It was your royal family that kept the scepter nice and safe for all these generations. Now that they've served that purpose, though, I have no further need of them. It will take only a fraction of this power to wipe your kingdom off the map! Haahaha!"
- Sonic Team, Dimps (14 September 2007). Sonic Rush Adventure. Nintendo DS. Sega. Area/Level: Coral Cave. "Blaze: Those pirates have gotten their hands on the Jeweled Scepter. It's an ancient treasure from my homeland, and I've got to get it back right away!"
- Sonic Team, Dimps (15 November 2005). Sonic Rush. Nintendo DS. Sega. Area/Level: Exception. "Burning Blaze: I understand now... My inherent power over fire... As princess, it is my duty to protect the Sol Emeralds."