First Appearance Dass Jennir

Dass Jennir is a human male Jedi Knight who survived Order 66.  His exploits after the fall of the Republic are told in the Star Wars: Dark Times titles.  Some Star Wars fans familiar with the title might be surprised to learn Dass' first appearance is not in Dark Times #1, but in Star Wars: Republic #79.

Star Wars: Republic #79a - Dark Horse Comics, U.S. (November 2005)
1st appearance of Dass Jennir

Star Wars #79 is the first part in the two part story arc Into the Unknown.  The story follows two Jedi, Master Kai Hudorra and Knight Dass Jennir, immediately after Order 66.  Each start on a different planet and have to evade capture by the Empire to reach Coruscant for answers.  On Toola, Master Kai Hudorra is joined by Padawan Noirah Na and, after some close calls with the Empire, are able to book passage to Coruscant.  On New Plymto, Dass Jennir encounters the Nosaurian Bomo Greenbark while escaping from his troops.  Dass learns that he and his troops were deceived about the reason they were fighting the Nosaurians on New Plymto.  The leader of the Nosaurians, Commander Rootrock, provides Dass with a ship to return to Coruscant.  On Coruscant, both Jedi are part of a crowd watching the Jedi Temple burn and witness a Jedi get gunned down by the Empire's soldiers.  The two Jedi meet and Kai Hudorra decides to go into hiding, while Dass Jennir decides to return to New Plymto and help the Nosaurians.

Star Wars: Republic #80a - Dark Horse Comics, U.S. (December 2005)
1st cover appearance of Dass Jennir

It is clear from reading the story, it was meant to be a standalone two part arc without a followup.  The remaining two issues in the Republic title provide an ending for Jedi Master Quinlan Vos' story.  A year after Star Wars: Republic #79 is published, Dass Jennir and Bomo Greenbark would return.  Despite having no plans for the characters outside the two issues, Star Wars editor Randy Stradley and artist Doug Wheatley decided to use them in the new title Dark Times.

Star Wars: Dark Times #1a - Dark Horse Comics, U.S. (November 2006)

Doug Wheatley provides the artwork for all the story arcs that Dass Jennir appears.  The Dark Times series within a series only has 33 issues despite being published over a 7 year period.