Tristan Wren, brother of rebel Sabine Wren, is a capable yet conflicted warrior. Along with his clan, he aligned with the Empire following the occupation of Mandalore, and blamed his sister for her role in its fall. But after a clash with Gar Saxon on Krownest, he now stands with his sister in defiance of Imperial tyranny.
- Sabine having a sibling was an idea the Rebels producers had since during initial development of the show, but they originally intended for her to have a twin sister called Sacha Wren. They eventually changed her sibling's gender and considered introducing him earlier as The Protector of Concord Dawn, but he was replaced by the new character Fenn Rau.
- Early in development, Tristan's name was Jona Wren.