Gremt Stryker Knollys is a spirit of unknown origin first introduced in Prince Lestat, and one of the three founders of the Order of the Talamasca. His physical body has dark hair and bright blue eyes.
Gremt refers to himself as a "simple spirit" and has no knowledge of a life before he existed in the incorporeal realm of spirits. He does recall when Amel entered the spirit world, and witnessed Amel's possession of Akasha, inspiring him to attempt to come to Earth in a physical form.
First coming consciously to Earth in approximately 585 CE at the Monastery of Vivarium at the time of the death of the scholar Cassiodorus, Gremt awoke from the beehives in which he had been slumbering, and took the form of a scarecrow. Pandora, witnessing this, conversed with the newly conscious spirit, telling it:
"If you would have fleshly life, human life, hard life which can move through time and space, then fight for it. If you would have human philosophy, then struggle and make yourself wise, so that nothing can hurt you ever. Wisdom is strength. Collect yourself, whatever you are, into something with a purpose ... But know this: if you would become an organized being as you see in me, love all mankind and womankind and all their children. Do not take your strength from blood! Do not feed on suffering. Do not rise like a god above crowds chanting in adoration. Do not lie."
By 748, Gremt had discovered how to form for himself a physical body, and had been living among humans when he encountered the ghost of the vampire Hesketh and instructed her how to do the same. Gremt, Hesketh, and her still living vampire companion Teskhamen come together to found the Order of the Talamasca, with the purpose of seeking knowledge to better understand themselves.
Gremt comes into contact with vampires in 2013 to warn them of changes he and the other founders of the Talamasca have seen in the nature of Amel. By this time, he has taught several ghosts how to create physical forms, including Raymond Gallant, Magnus, and Riccardo. He and the ghosts of the Talamasca meet with various vampires, and come to Trinity Gate after Lestat is named Prince. Lestat seeks Gremt's counsel as Amel's spirit becomes restless during Prince Lestat and the Realms of Atlantis, and Gremt warns him against trusting Amel. By Blood Communion, Gremt and the other Elders of the Talamasca, having handed control of the organization over to its mortal membership, are living and working with the community of Replimoids in their further mission to understand their natures.
In Merrick, David Talbot mentions that Talamasca members have a general fear of bees, sensing that bees have something to do with their founding. This is a reference to Gremt's first appearance on Earth, where he was originally spiritually entangled with hives of bees.