The Shilat hologram was created by the chief engineer Ezral two years after his supply ship crash landed on a planet in 2129. The hologram was a recreation of the real Shilat who died following the crash.
The Shilat hologram encountered T'Pol and Trip Tucker when an away team from Enterprise NX-01 beamed down to the Kantare supply ship. He later kidnapped T'Pol and arrested and guarded Tucker in the Kantare ship's optronics room. (ENT: "Oasis")
The Shilat hologram was played by actor Donald Sage Mackay though he received no on-screen credit for his appearance.
In the final draft script of "Oasis", a note specified, "Shilat's wardrobe is very distinctive and unique from the [other Kantare]."