Andreas

Andreas was a Jedi Master to the apprentice Alura who later betrayed him and joined her Sith brother Loban to kill him.

Before Loyalty
Andreas had been a master over his apprentice Alura who was often protested against the Jedi not making any action in war. She soon left which worried Andreas and he had many conflictions about it while meditating at a river on Yavin 4.

Duel and Brush With The Dark Side
While meditating on his apprentice's absence he soon felt her trying to sneak up on her using the Force to cloak her presence. However he commented on her ability which made her doubt any actions she was about to do. Once her brother stepped in, Andreas soon realized that Alura's attempt to sneak up on her master may have been a distraction so Loban could be unexpected. Andreas questions Alura's motives once he refuses to join her and her brother. Seeing the siblings ready themselves he also readies his pike and as soon as they activate their lightsabers to attack Andreas switches his blade on beginning the duel. Throughout the fight he tries to split them up which succeeds once he knocks out Alura in which he regrets causing any harm to. Singling Loban out, they continue the duel but Loban strikes the emitter of Andreas' blade at it blows up causing Andreas to fall on the ground then be kicked over by Loban. Andreas gets up and accepts his fate almost fully. Feeling the doubt in Alura he then tries to persuade her to not kill him for her sake so Alura doesn't kill him then defends him. Andreas manages to get up only to see Loban stab his sister. After punching Loban Andreas goes over to Alura only to duel Loban once more when he tries to attack. Andreas however uses the dark side of the Force as well as Juyo to defeat Loban blacking out. After he kills Loban and distraught at what he's done he runs over to Alura to promise that he won't fail her again.