Yi

Born into the pages of IDW's The Last Ronin expanded universe in 2023, Yi is a Modern Age character who made her entrance in Lost Years #1 under the creative hands of Kevin Eastman, Tom Waltz, S. L. Gallant, and Ben Bishop — a powerhouse team steeped in Turtle lore. She shares her adventures with the legendary quartet of Leonardo, Raphael, Michelangelo, and Donatello, as well as the formidable Casey Marie Jones, placing her squarely at the heart of one of IDW's most celebrated and emotionally charged storylines. With appearances spanning Lost Years, Re-Evolution, and the Lost Day Special, Yi is a fresh but meaningful presence in this darker, mature chapter of the TMNT saga. Seven catalog appearances in just a couple of years signals a character with real momentum — one well worth tracking as this corner of the Turtles universe continues to unfold.