Jaessa Willsaam is a yandere to Male Emperor's Wrath (and eventually the female, too) in Star Wars: The Old Republic.
Background[]
Jaessa would only be a Jedi Padawan with the unique ability to sense the true nature of other sentient beings. Thanks to that ability, Jedi Master Nomen Karr saw an opportunity to use her ability to find all of Darth Baras's spies. To avoid that, Darth Baras sent his apprentice to take care of the problem, the apprentice defeated the Jedi master and later corrupted Jaessa into becoming a Sith.
Personality and Yandere Traits[]
After being corrupted, Jaessa becomes a Sadic Sith who enjoys killing and torturing. She, too, is in charge of killing the Sith who are in danger of joining the light with the permission of her master.
If Wrath is male, Jaessa will begin to show some obsessive love for her Sith master, to the point of killing any potential lover except for the Twi'lek Vette. If the Wrath does not get a lover, she praises his fidelity, but will be disappointed that she could not have killed anyone.