Sek was a male Vulcan in the 24th century. He was the firstborn son of Tuvok and T'Pel. He had two younger brothers and a younger sister named Asil. He was married and had a daughter, T'Meni.

Sek had to endure the presumed loss of his father in 2371 when the USS Voyager was presumed destroyed. Between 2371 and 2374, Sek went through the pon farr, mated, and became a father himself. He named his child after his paternal grandmother, T'Meni. Later, in 2374, Sek learned that the Voyager was not lost, but, in fact, was in the Delta Quadrant, and that his father was still alive. His mother sent a letter to Tuvok to tell him about Sek and their family's changes. (VOY: "Message in a Bottle"; VOY: "Hunters")

In 2377, Sek sent a message to his father over a datastream, via the MIDAS array, sent to the Voyager regarding his studies of music, having found exolinguistics too theoretical. Unknown to either of them, Bajoran radical Teero Anaydis hid a subliminal message set to Vulcan brainwaves in the message, so that when Tuvok watched the message, it activated a mind control program in his psyche that Teero had implanted years earlier. (VOY: "Repression")

Sek was played by actor Ronald Robinson.
Anthony Montgomery was also considered for the role. [1]
His mirror universe counterpart (β) was mentioned but did not appear in the novella The Mirror-Scaled Serpent. He is said to have died of an infection during the 2360s, though a Cardassian physician tried hard to save him.
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