Sara Wright is a rarely mentioned, off-screen character in the "Big Nate" comic strip. She married Nate's dad, Marty Wright, and they gave birth to Nate and Ellen Wright. However, she divorced him at an unknown period. She was first mentioned on May 11, 1997.
In Big Nate Makes the Grade and Big Nate and Friends, Nate mentions that Sara divorced from his father when he was really little, left the family, and that she lived over 2,000 miles away from him, so he rarely saw her and could only send a card every once in a while and a phone call. The reason why she divorced from Nate's father is unknown.