For those who have not seen Wonderland (or have no desire to see Wonderland) I’ll give you a basic rundown of Will Scarlett/The Knave of Hearts
Spoiled out in case you do want to watch ONCEWL someday
Will Scarlett came from the EF. He was a thief in Robin Hood’s band of Merry Men for a short time, though he really had no desire to be. He was trying to steal a looking glass from Maleficent and getting in thick with Robin was the way to do that. He was stealing the looking glass so that he and his true love, Anastasia, could flee the EF and start a life some place else. Anastasia is also Cinderella’s step sister. The two went to Wonderland where they had a very hard go of it, sleeping in a wagon, foraging for food. Ana grew unhappy with her lot in life so when she met the Red King and he offered her a crown and jewels in return for marriage, Ana left Will and became the Red Queen. Will was broken hearted and had a run in with Cora and begged her to remove his heart, which she did. She then used his heart to control him Will into being her Knave. Will later met Alice in Wonderland and Alice got Will his heart back. At some point Will must have gone back to the EF where he was picked up by Regina’s curse and taken to SB. After Emma broke the Curse, the White Rabbit came to find Will and take him to rescue Alice so that the two could rescue Alice’s true love, Cyrus, a genie. They had a lot of adventures but the first half of the season ended with Will being turned into a genie himself