King Olaf kept the dragon in captivity as a personal pet in Dragonsreach, which was built to house the humiliated beast. After Numinex died, his head was removed and placed above the Jarl of Whiterun's throne, where it remained through the events of The Elder Scrolls V: Skyrim.
- It is possible that King Olaf used the Bend Will shout to take Numinex into submission.
- Paarthurnax has said that he would visit Numinex during his imprisonment and that Numinex was so lonely and disturbed by his captivity that he could not remember his own name. How Paarthurnax was able to visit Numinex and escape without notice or why he did not try to free Numinex is never explained.
- Numinex is the subject of Skyrim's first revision to King Olaf's Verse during the end of the quest "Tending the Flames". Depending on the player's decision, they can claim that Olaf captured Numinex while he was asleep, made some sort of deal with him, or that Olaf was Numinex himself masquerading as a human. While the third is obviously a falsehood and is marked as such by a "Persuade" tag, it is unknown if either of the other two answers holds any truth.
- Dragons in Elder Scrolls are immortal, however the suggestion seems to be that Numinex died in captivity, rather than being slain in battle. His cause of death is still unknown. As the only known piece of his remains, his head, was held within Whiterun's castle, Alduin could not reach him to resurrect him.
- Unlike other dragons, Numinex's name is not a Dovah shout. It is possible this is a name ascribed to him by humans and not his true name, which would be a reason for him to forget his name as Paarthurnax said he came to, but contradicts Paarthurnax using it as his name.
- The Elder Scrolls V: Skyrim (Mentioned only)