Arlo Grennen

Arlo Grennen was a male Jedi Master who served the Jedi Order and the Galactic Republic during the Galactic War with the reconstituted Sith Empire. Grennen decided to investigate the influence of the dark side of the Force on the moon Yavin 4, and searched through the libraries of the Jedi Temple on the planet Tython to find information on the moon before heading there himself.

Grennen recorded his research in a journal, documenting the moon's history with the Sith, including the Sith Lord Naga Sadow and the fallen Force-users Freedon Nadd and Exar Kun.

However, the longer he stayed on the moon, the more the influence of the dark side corrupted the Jedi Master, and he believed that he would be the next in line to inherit the dark side from Exar Kun; however, he was driven mad by the spirit of the Sith Emperor sometime between 3640 BBY and 3637 BBY. Grennen foresaw the arrival of the former Jedi Revan, and vowed to do everything he could to stop Revan from destroying the Emperor, but the Emperor ignored Grennen's devotion and absorbed the Jedi Master's essence, killing Grennen.

Text and facts from the “Arlo Grennen” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.