The translator who switched sides
Nicholas Sanders is a human captured by the hwarhath who becomes the translator, adviser and lover of the alien general Ettin Gwarha. When the xenobiologist Anna Perez meets him at the first-contact negotiations, both species distrust him: humans see a traitor, and many hwarhath see a dangerous animal their general has tamed. His position shows what it costs to be the only person who fully understands both sides of a conflict. The mediator loses belonging in either camp in exchange for that understanding.
