One of three Takret who warn Enterprise of an approaching neutronic storm and take refuge with the crew in the catwalk, concealing that they are deserters.
Renth appears in The Catwalk. He arrives with Tagrim and Guri in a small ship, warning Archer that a neutronic wavefront many light-years across is about to sweep through the region and that no ordinary hull will protect the crew.
The three join the crew in the maintenance shaft running through one of the warp nacelles, the only heavily shielded space aboard, for a cramped week-long stay.
Their story unravels when Takret Militia soldiers board the apparently empty ship looking for them. Renth and his companions admit that they deserted from the militia, and Archer chooses to protect them, bluffing the soldiers into leaving by threatening to destroy Enterprise.