Mary (young)
Mary Sandra Winchester (née Campbell) (born December 5, 1954 – 2019) was a hunter, the daughter of Samuel and Deanna Campbell, the wife of John Winchester, and the mother of Dean and Sam Winchester. After retiring from hunting to be with her family, Mary was killed by the Demon Azazel exactly six months after Sam was born, which spurred John into becoming a hunter to kill Azazel in revenge and raising their sons as hunters as well. 33 years later, after Dean reunited God and The Darkness, she was resurrected by the latter as a gift for Dean. The Darkness later revealed that she brought Mary back to help Dean see that the real Mary is better than the dream of his mother that Dean had held onto for so long in an attempt to get Dean to accept his life and let go of his anger.
After her resurrection, Mary struggled with her new surroundings that have changed in the last three decades which caused her to briefly leave her sons. She became aligned with the British Men of Letters who helped her sharpen her skill as a hunter and better adapt to the new world though alienated her from her sons. Mary soon formed a relationship with Arthur Ketch but she became aware of that he and his superiors had ulterior motives for other hunters. She tried to protest but was subdued and put under their control, making her a pawn to their whims. With help from her son Dean, she broke free and aided her fellow hunters in taking down the British Men of Letters in America.
Mary then returned to her children, though she was soon separated from them again after protecting them from Lucifer and was sent to an alternate reality with him. In the other world, Mary was imprisoned by the Archangel Michael who rules over that world and wanted to invade her world. Mary is liberated from Michael's clutches by Lucifer's son who was sent to that world while trying to find her.
Afterwards, Mary and Jack would go onto form a resistance against Michael. In the months that followed, the two saw many victories before they were reunited with Sam, Dean, and Castiel who journeyed to the world to save them. Mary did not want to abandon the fight but was persuaded after they promised to evacuate the civilians as well.
Following her return to the Main Universe, Mary continued hunting though she began living in Donna Hanscum's cabin with Bobby instead of the bunker. After a soulless Jack kills Nick for trying to resurrect Lucifer, he accidentally kills Mary in a brief fit of rage. Mary is reunited with her husband in Heaven and is now at peace in a shared Heaven with John.
Sleepy Hollow, the Missing Episodes + Visions of Valentines[]
She, along with Sam, were enlisted as Team Witness' new recruits. She pretty much functions as a mediator/mother of the group, even encouraging Sam to continue his dream as a lawyer online, while functioning as a paranormal fighter like her. The fics could be taken place after she was resurrected after defeating the Darkness.