A Trill government minister who testifies as an expert on joined Trill at the extradition hearing of Jadzia Dax on Deep Space 9 in the first-season episode Dax.
Selin Peers is a Trill official seen in the first-season episode Dax. When Ilon Tandro of Klaestron IV seeks to extradite Jadzia Dax for a murder allegedly committed by Curzon Dax thirty years earlier, Peers is called before the arbiter Els Renora as an authority on the nature of joined Trill.
Questioned by Tandro, he explains that a symbiont carries the memories of every host from one lifetime into the next, which supports the argument that Dax remains answerable for Curzon's acts.
Benjamin Sisko then draws out the other half of the picture: each joining blends host and symbiont into a new person, and Jadzia is not Curzon. Peers accepts the point, leaving the hearing with a question that Federation law had never had to settle.