Tharja is a Dark Mage Plegian who is apathetic of the conflict between Plegia and Ylisse, who one day after being recruited by Chrom, meets the Avatar and quickly becomes lovestruck with them. Tharja first appears in Chapter 9, where she states that she is hesitant in fighting alongside Chrom and his army, but after a brief conversation, she decides to join the cause.
Tharja is known for her unfriendly personality towards others like randomly hexing them, while being abnormally obsessed with Robin, regardless of the gender, and frequently stalks them time and time again, studying their daily life ever since they first met. In her supports, she briefly mentions that if the Avatar chooses to back out of the relationship after proposing to her, then she will murder them in their sleep. Tharja also has family issues, stating to Kellam that she often communicates them while telling Robin she has none. Tharja is however able to form friendships with others. She has the nicest body in the army and the darkest thoughts. Her birthday is April 2.
Tharja does not appear as a playable character, but one of Lucina's pallette costumes are based around Tharja's color outfit, but her trophy featured in a leak was removed from the 3DS version entirely, because it is speculated the ESRB considered her outfit to be too exposing to maintain the E10+ rating.
Tharja appears as a Dark Mage Mirage who can promote to a Sage or Sorceress, but she is also dedicated to supporting Kiria Kurono in any situation while sharing a strong friendship and pokes fun at her crush on Itsuki.
Virion returned home to Rosanne where he was labeled a traitor and a coward, or else ignored entirely. But a few well-placed hexes from his wife, Tharja, eventually brought the populace to their senses.
Vaike returned to the streets that raised him and was welcomed as a hero and brother to all. Still, he was no match for Tharja, whose frequent curse slinging put her husband in an understandably foul mood.
Gaius never lost his sweet tooth, though he ultimately returned to less savory enterprises. Meanwhile, his wife, Tharja, set up shop and hexed people for a living. The pair were said to get many odd looks.
Tharja also shares her Japanese voice actress, Akutsu Kana, with Cherche and Rhajat.
Tharja has had numerous instances of censorship and change.
In a rumored leak from the ESRB, the 3DS version of Super Smash Bros. for Nintendo 3DS/Wii U was supposed to have 686 trophies, and a Tharja Trophy was shown in the leak. However, her trophy is not present in the released game. There are only 685 trophies (not counting DLC) in all regional versions of the game. It was speculated that she was most likely removed to avoid a "T" rating, rather than the E10+ the game has. None of this information was ever officially confirmed.