Rosalyn Bain

Rosalyn Bain was the wife of Reginald Bain, mother of Sophie Bain and Audrey Bain, adopted mother of Tovar, and a tactics instructor at Starfleet Academy.

She was also, unbeknownst to her husband, a Section 31 agent.

Rosalyn was sent by Section 31 to protect both the Federation's peace talks with the Breen and her husband's life. With the help of her adopted son, Tovar, who already knew that she worked for Section 31, she was able to stop a holographic assassin. Despite this, Bain decided to leave Breen and let other diplomats handle the peace talks. Before leaving as well, Rosalyn cloaked herself and beat up Thot Phul, who had hired the assassin. (Mrs. Bain, You're Needed [BG])

Since she didn't want Bain to even consider going back in time, she used Section 31 technology to go back to the USS Secondprize when Jaroch was captain and got saved a copy of his pattern in a transporter buffer, which she then sent to Bain. He used that to create a body for he Interloper life force to go into when it was transferred out of Tovar.