Wicked Witch of the West
The Wicked Witch appears as the main antagonist of the second half of Season Three of "Once Upon a Time" played by Rebecca Mader. This version goes by the name of Zelena (which means "green" in some Slavic languages). Zelena is discovered to be the daughter of the Queen of Hearts/the Miller's Daughter/Cora (Barbara Hershey/Rose McGowan), making her the older, long-lost half-sister of Regina the Evil Queen (Lana Parrilla). Zelena visited Rumplestiltskin (Robert Carlyle) and learned from him how to control her own powerful magic. Her storyline revolves around her efforts to create a time-travel spell that will allow her to go back and prevent the birth of Snow White's mother, Ava, who informed Prince Leopold (Cora's fiancé) that Cora was with child to sabotage Cora's attempts to infiltrate the royal family (before she can ruin Zelena's life, and thus Zelena would be raised as royalty. But despite Zelena's efforts to create the deadly time portal Emma Swan (supposedly the only wielder of light magic powerful enough to oppose her) her plans are halted when the Evil Queen masters light magic in time to oppose her (although her time-travel spell is completed, it takes effect after her presumed death, transporting Emma and Captain Hook (Colin O'Donoghue) back to before the original curse was cast). She was later thought to have been killed by Rumpelstiltskin.
Will Scarlet
In 2013, "Once Upon a Time" spinoff "Once Upon a Time in Wonderland", mostly based on "Alice in Wonderland" and its sequel "Through the Looking-Glass", revealed in its third episode, "Forget Me Not", that one of its main characters was not only The Knave of Hearts from the popular children's tale, "Alice in Wonderland", but also Will Scarlet. In the series finale it was revealed that Will became The White King from "Through the Looking-Glass". He is played by English actor Michael Socha. In 2014, Michael Socha returned to the role as a main cast member in "Once Upon a Time in Wonderland"s parent series, "Once Upon a Time". His appearance in the show's fourth season takes place after "Wonderland", with him ending up in Storybrooke, Maine due to Snow White's curse. Here, he begrudgingly reunites with Robin Hood, until Robin is forced to leave Storybrooke with Maid Marian to save her from the Snow Queen's curse. He later engages in a short-lived dating relationship with Belle.