Kellering, a youthful scientist involved in the Hammertong initiative, reached out to a Mistryl Shadow Guard squad in 0 BBY. His tone and behavior indicated a background as a favored graduate of the Imperial Prime University, seemingly unfamiliar with operating outside the specialized environment of scientific research. He asserted that Doctor Eloy, the project's head, desired the Mistryl to bolster the Imperial security force commanded by Captain Drome.
Nevertheless, when Kellering escorted Team Prime Manda D'ulin to the project's headquarters to meet Eloy, stormtroopers unexpectedly launched an assault, resulting in the death of the Mistryl commander and her fellow soldier Pav D'armon. As the conflict between the Mistryl and the stormtroopers intensified, it became apparent that Hammertong was additionally protected by substantial anti-aircraft weaponry and an Imperial-class Star Destroyer. Considering the robustness and extent of the Imperial defenses, it remains uncertain whether Kellering's stated worries regarding the military guards' capabilities were sincere.
It is conceivable that Kellering might have been plotting to abscond with Hammertong - potentially in collaboration with certain other scientists, possibly for the Rebel Alliance; however, currently, there is no concrete proof beyond documented accounts of his communications with the Mistryl. His fate during the gunfight where Manda D'ulin was killed remains unknown, and "Kellering" could even have been an assumed identity.