Jecki Lon is a Theelin-human hybrid Jedi Padawan in the High Republic Era, born around 150 BBY. Trained by Jedi Master Sol, she is noted for her maturity and calm demeanor. During a mission in 132 BBY, Jecki assists Sol in apprehending a suspect, Osha Aniseya, related to the murder of Master Indara. Throughout the mission, she demonstrates critical thinking and adaptability, navigating challenges and questioning motives, ultimately leading to significant discoveries about her master and their past. Jecki Lon wields a green lightsaber and dons traditional Jedi robes.

Jecki Lon's character was introduced in the 2024 Disney+ series "The Acolyte," portrayed by Dafne Keen. The series creator Leslye Headland was inspired by the character Rystáll Sant and aimed to create a Theelin Jedi, casting Keen for her dynamic portrayal of complex emotions and her prior roles. Keen infused her character with a subtle, unspoken attraction to Osha, adding layers of internal conflict typical for a Jedi navigating attachments and emotions.