King Olaf kept the dragon in captivity as a personal pet in Dragonsreach, which was built to house the humiliated beast.
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 unknown.
- 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 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, which are generally composed of words in the Dragon language. It is possible this is a name ascribed to him by humans and not his true name. This, along with imprisonment and shame, is likely how he came to forget his true name when visited by Paarthurnax.
- The Elder Scrolls V: Skyrim (Mentioned only)