Regina & Zelena
Regina and Zelena are sisters, who spent a lifetime of fighting and backstabbing each other. Regina grew up with Cora, while Zelena was sent away to live on her own. She wound up in Oz, with a lifetime of jealousy towards her sister. It wasn't until when Cora told them that long ago, they knew each other and loved each other as sisters that they started to form a new bond. But it didn't change the fact that Zelena stole Robin Hood from Regina and had a baby with him. Through the ups and downs, Regina & Zelena grew closer to each other and are now a team, whether they like it or not.