May

May is the daughter of the witch Lily Sunder.

Background
Born sometime before the 20th century, May was Lily Sunder's daughter when she was still a professor of apocalyptic lore. Lily's studies had led her to summon the angel Ishim, who developed an obsessive passion for her.

Lily realized this angel was the equivalent of a monster, and chose to cut all ties with him. When Lily fell in love and married Akobel, a jealous and enraged Ishim tricked his garrison into believing that Akobel had broken the rules by fathering a Nephilim. Akobel was executed, while Lily was killed by Ishim in retaliation for her mother's marriage to Akobel.

The other angels never found out that the child was a normal human, or that Akobel's charges were based on Ishim's jealousy. In 2017, Lily Sunder sought vengeance on all the angels who were a part of this garrison. Castiel alone was spared as he helped to find out the truth behind Akobel and May's deaths. Castiel avenged them both when he killed Ishim.

With her mission accomplished, Lily was finally at peace.

Appearances

 * Season 12
 * Lily Sunder Has Some Regrets