The cheerful Irish-accented Emergency Navigational Hologram of La Sirena, who helps Raffi realise in 2399 that the Romulan symbol of eight circles depicts an octonary star system.
Enoch is the navigation specialist among the five holograms of La Sirena, each of them a variation on Cristobal Rios and each played by Santiago Cabrera. He is the sunniest of the set, with an Irish lilt and a real delight in stellar cartography.
He is introduced in Absolute Candor and is most useful in Broken Pieces. There Raffi, trying to make sense of the phrase Conclave of Eight, learns from him that it need not mean eight conspirators. Enoch explains that a system of eight stars would be so improbable that it would have to be artificial, which points the crew towards the place where the Admonition was left.
In the same episode he joins the other holograms when Raffi gathers them to piece together what their captain has hidden from himself.