Mikoto Uchiha

was a jōnin-level kunoichi of Konohagakure's Uchiha clan.

Background
After marrying Fugaku Uchiha, she settled down to become a housewife, raising their sons Itachi and Sasuke. Just before her friend Kushina Uzumaki gave birth, she met with her and introduced Sasuke. She agreed with Kushina's hopes that their sons would become friends. After Kushina asked whether or not childbirth was painful, Mikoto laughed, having found the one thing that Kushina was seemingly afraid of.

During the Nine-Tails' Attack on Konoha, Itachi noted that she and Fugaku were noticeably absent before the beast struck. What she was doing is currently unknown.

Despite her concentration on domestic pursuits, it was presumed she was also very trustworthy to be at Fugaku's side when the latter began plotting a coup d'etat against the Senju-led government of Konohagakure. In her last moments, during the Uchiha clan massacre she was seen sitting beside her husband, sharing their last words to Itachi. She was later found dead with her husband killed by Itachi. This would later prompt Sasuke to want to avenge her death along with the rest of the clan.

Personality
Mikoto was a very gentle and kind woman, but could also be stern and strict when she needed to be. She loved and cared about her sons deeply, and knew how to help them with their problems. Mikoto cared for and also held high respect for her husband as well and understood the importance of his position as the Uchiha clan leader. She also gave Sasuke advice and tried to reassure him about Itachi. She was a very good mother, seeing as how Sasuke was able to talk to her better than his father. At one point, in order to cheer Sasuke up, she says that when she and Fugaku are alone, Sasuke is all he talks about. Although she was Itachi's mother, she, like other clan members, grew suspicious of his strange behaviour. Despite this fact, she cares about Itachi as she and her husband told Itachi they were still proud of him, despite the fact he chose Konoha's side over the Uchiha clan's, before they let Itachi kill them without putting up any resistance.

Appearance
Mikoto was a fair-skinned woman with long, black, hair with bangs hanging on either side of her face and black eyes. She wore a simple dark purple blouse with a red-plum skirt and a light-yellow apron over it. In Kushina's flashback, she is shown to be wearing a brown blouse similar to the purple one she wore, a dark purple skirt, blue shinobi sandals and the bangs on either side of her face were shown to be considerably longer.

Abilities
While little is known of her career as a kunoichi, she was presumably skilled enough to have been promoted to the rank of jōnin. In the anime, she offered to help Sasuke with his shuriken training, this could imply that she was at least competent with shurikenjutsu.

Trivia

 * In the character introduction of the Viz Media translation of volume 25, instead of the name "Mikoto," she is simply credited as "Sasuke's Mother".
 * means 'precious' and 'nobility' and is used as a title for Japanese gods.
 * At the end of Naruto: Shippūden episode 252 in an omake called Rock Lee's Silly Chronicles, Mikoto can be seen standing next to her husband and, Itachi, watching, Sasuke and other characters play a game of baseball. Kushina, Minato and Jiraiya were also seen watching the game.
 * Mikoto's name was likely inspired by the mythological god Susanoo-no-Mikoto, who wielded the Sword of Totsuka. Both of her sons, Sasuke and Itachi, would later be able to use Susanoo with Itachi's wielding the Sword of Totsuka.

Quotes

 * (To Sasuke) "That's not it… Your father is the representative of the whole clan… If the clan is in a bad position, he must protect it. Itachi is the older of the two of you… The job of looking after the clan must be left to him… Your father is the supervisor of that job so that's probably why he pays more attention to your brother… But the conversations in here alone… When your father talks to me, he only talks about you… and because of that… he's always awkward with you."
 * (To Kushina and Biwako about Sasuke's name) "Yes. So he grows up to be a strong, splendid shinobi."