- All stealth skills (including Archery) improve 20% faster.
- Increase critical strike chance by 7%.
During the events of The Elder Scrolls Adventures: Redguard, Cyrus encountered a young Redguard male named Coyle who recited a verse about The Thief: "Clever Thief watches... Lover sighting... Shadow lying... Tow'r defying... Through the night." The exact origin of the verse is unknown but it is accompanied by others, each pertaining to the other guardian constellations, and is used as a mnemonic device.
- In Oblivion, using The Thief birthsign is an effective way to raise Luck faster than one normally would, considering that Luck progresses slower than all other attributes due to its lack of associated skills.
- In Oblivion, The Thief grants the greatest attribute increase of any other birthsign, providing a total of 30 extra attribute points.
- The outline of The Thief constellation can be found in an Elder Scroll. This is appropriate considering that it is the same Elder Scroll that was stolen from the Imperial Palace in the Third Era.
- The Elder Scrolls: Arena
- The Elder Scrolls Adventures: Redguard
- The Elder Scrolls III: Morrowind
- The Elder Scrolls IV: Oblivion
- The Elder Scrolls V: Skyrim
- The Elder Scrolls Online