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.
It's Not Easy Being Green (Once Upon a Time)
Zelena feels that with Rumplestiltskin teaching her, she now feels happy with him. Unfortunately, this would all change when he skips out on a feast that she made for him in order to continue teaching Regina, making her more envious than ever. This prompts her enter to Regina's bedroom to kill her with a blade, only to find out that she was tricked by Rumplestiltskin (disguised as Regina). Zelena discovers that she had failed his test because the curse demands giving up the thing you love most, and that was her love for Rumplestiltskin, who then responds "It's OK. I have that effect on women." She also discovers that Rumplestiltskin has already trained Regina to become powerful, and Zelena's throat turns green. Rumplestiltskin then tells Zelena that unless she can take him to a land without magic, Regina is the one for the job. Zelena says bitterly that she could have, thanks to her slippers, but tells him it's too late for that, since he had already chosen Regina. Then, Zelena tells Rumplestiltskin that the only way he could get the slippers from her was to kill her, only to teleport away when he tries to. She says "The next time, you will choose me." Using her slippers, she then returns to Oz.