- "At the top of the Yeerk Empire is the Council of Thirteen. One of those thirteen is emperor, but no one knows which one. It's a closely guarded secret. The Yeerks fear assassination."
- ―Elfangor-Sirinial-Shamtul
The Council of Thirteen is the ancient ruling body of the Yeerk Empire, which even the highest and most powerful Vissers answer to. One of the council members is known as the Emperor, but no one but the Council members know who it is, in order to combat assassination attempts, as one would have to kill all thirteen to successfully eliminate the Emperor. A seat on the Council of Thirteen is the highest position in the Empire, which those, such as Esplin 9466, aspire to be in.
Known Members
Appearances
- The Visitor (mentioned)
- The Andalite Chronicles (mentioned)
- The Threat (mentioned)
- The Hork-Bajir Chronicles (mentioned)
- The Reunion (mentioned)
- VISSER
- The Mutation (mentioned)
- The Weakness (mentioned)
- Back to Before (mentioned)
- The Familiar (mentioned)
- The Test (mentioned)
- The Revelation (mentioned)
- The Deception (mentioned)
- The Sacrifice (mentioned; referred to as "Yeerk High Council")