Biwako Sarutobi

was the wife of Hiruzen Sarutobi and the mother of Asuma Sarutobi. She was one of the few people to know about the special circumstances surrounding Naruto Uzumaki's birth, acting as a midwife for Kushina Uzumaki. She was killed by Madara Uchiha immediately after Naruto's birth.

Personality
Biwako seemed to be as wise and intelligent as her husband giving somewhat sagelike advise to Kushina about childbirth. She also seems to be very strongly opinionated about women, stating that they were far stronger than men because they can endure child birth while men cannot. She also wasn't above reprimanding Minato for not focusing on keeping the seal in tact during his wife's birth even though he was Hokage.

Quotes

 * (To the Fourth Hokage)