Megumi Dulmur was a Human female and the ex-wife of Marion Dulmur
In 2364, the Dulmurs were adjusting to life on the Nehru Colony when Marion was fired from his job at the Chandra Detective Agency because of the Manheim Event. After the even, Marion got a job with the Federation Department of Temporal Investigations. Marion travelled greatly in his new job and was obsessed with it even when he was at home, alienating Megumi.
In 2368, Megumi finally got tired of Marion's new job and told him she was leaving him. Marion made an attempt to get her back but was eventually drawn back to the DTI. (DTI novel: Watching the Clock)