Tristan

Father Tristan was a human cleric at the Temple of Sarenrae in Emon.

Before the Stream
When Pike was killed fighting a glabrezu, Vox Machina brought her body to the Temple and asked Father Tristan to perform a resurrection ritual. With their well-trained clerics, the Temple succeeded in bringing Pike back to life.

The Briarwoods
In "Crimson Diplomacy", when Vax was nearly killed by the Briarwoods and feeling the affects of a vampire bite, Vox Machina once again returned to the Temple of Sarenrae. There they met Father Tristan again who helped disinfect Vax's wounds and agreed to make the water in Tiberius' decanter holy over the course of several days.

In the "Path to Whitestone", when Vax bought supplies for Vox Machina in the temple to help them combat vampires. Vax asks for a holy symbol of Sarenrae, Tristan gives one to him and Vax comments it reminds him of his Pike.