WARNING: The following article contains spoilers for Star Wars: The High Republic Adventures: The Monster at Temple Peak #3, on sale now from IDW Publishing.
Throughout the Star Wars: The High Republic Adventures: The Monster at Temple Peak miniseries, Ty Yorrick’s memories of why she left the Jedi Order have been interwoven with the current events of her hunt for the Gretalax. Her memories have focused on her friendship with her fellow Padawan, Klias Teradine, and their explorations of the Yallow Sanctum, a shrine built by the Yallow Fellowship, a dark side cult that was not connected with the Sith. While Klias' true fate is still unknown, the third issue of the miniseries reveals that Klias might have unwillingly been possessed, leading to a fall to the dark side that was out of his control.
Klias is first mentioned in Cavan Scott's audio drama Star Wars: Dooku: Jedi Lost, and his legacy is one of rebellion against the Jedi Order. Klias' journal leads a young Dooku and his fellow Padawan Sifo-Dyas to explore the Jedi Temple's Bogan Collection, a vault of dark side artifacts, and their adventure nearly ends in disaster. Klias' actual fate involves a similar excursion in Ty's flashbacks throughout Star Wars: The High Republic Adventures: The Monster at Temple Peak #1-3 (by Cavan Scott, Rachael Stott, Vita Efremova, Nicola Righi, Johanna Nattalie, Riley Farmer and Heather Antos). While Klias' ultimate fate is still yet to be revealed, their exploration of the Yallow Sanctum was so traumatic that it led to Ty leaving the Jedi Order.
Throughout the miniseries, Klias is shown to be cocky but ultimately obsessed with gaining more knowledge of the Force, even if he claims to only want the knowledge of the dark side to help the Jedi avoid its temptations. His overconfidence is clear from the first issue, but his enthusiasm for learning becomes even more apparent in Ty's memories during the second issue. When scaling the mountain to reach the Yallow shrine, Klias claims that it is their responsibility to learn more about all aspects of the Force if they want to become better Jedi. He even shows off techniques he learned from studying the Sabracci sages to both save Ty from falling off the mountain and to illustrate how much more there is to the Force than the Jedi's teachings.
Still, Klias' combination of curiosity and overconfidence proves to be his undoing. In the third issue, Ty remembers exploring the Yallow shrine with Klias Terradine. Klias wants to take many of the artifacts with them, but Ty protests against stealing from another culture, even an evil one, without permission. While this protest is admirable and respectful of the cultures present, the existence of the Bogan collections and vaults show that not all Jedi share Ty's convictions. Klias is convinced that the need to learn is greater than Ty's concerns, but this decision ends up having disastrous consequences.
While exploring, Klias accidentally activates a vitalicron, an artifact believed to contain the memories of one of the cultists. The artifact was genetically sealed, which means that Klias might be a descendant of a member the Yallow Fellowship. The art shows Klias surrounded by grim faces as he screams. The memories seem to do more than give information; Klias’ immediate plea for Ty to run suggests that the memories might be taking over him. The Yallow Fellowship seems to have created a way for their dark influence to reach beyond death, and Klias becomes their unfortunate target.
Therefore, Klias might actually have been a victim of possession instead of willingly abandoning the Jedi Order. Klias has gone down in history as a disobedient Padawan, but this reputation might not be a fully accurate assessment of him at all. While he does ultimately push against the boundaries placed upon Padawans and young Jedi, he did so more to try to expand the idea of what a Jedi could be rather than trying to rebel against the Order. Thus, his fate is even more tragic since he ultimately does not choose the dark side; instead, the dark side seems to have chosen him.