Singer 4 hasn't been the best singer breakpoint, as most good songs are either 3-cost or 5-cost, but with the new Sing Together songs, it may become more important
With the right setup (something Hypnotic Deduction can help with) the combination of Robin Hood, Sneaky Sleuth and Robin's Bow will let you quest far ahead while simultaneously clearing off the damaged characters on your opponents board
Robin Hood Sharpshooter 215/204 Im not sure how popular of a character Robin Hood is in the greater Disney fandom, however hes quite frequently depicted in Lorcana cards
That shows through with lots of classic princesses like Snow White, Cinderella and Belle
Epic and Iconic cards now join the existing six (Common, Uncommon, Rare, Super Rare, Legendary, and Enchanted)
But, unfortunately, she comes with a pretty significant downside where you need to have 5 characters in play to play her