Uno

Fresh out of the Modern Age and already carving a place in one of comics' most beloved mythologies, Uno made their debut in Teenage Mutant Ninja Turtles: The Last Ronin — Lost Years #1 in 2023, brought to life by the powerhouse creative team of Kevin Eastman, Tom Waltz, S. L. Gallant, and Ben Bishop. Emerging from the emotionally charged Last Ronin universe at IDW, Uno shares the page with the legendary turtles themselves — Raphael, Leonardo, Michelangelo, and Donatello — as well as Casey Marie Jones, which tells you this is serious, consequential storytelling territory. With appearances already spanning Lost Years, Re-Evolution, and the Lost Day Special, Uno is clearly woven into the fabric of this darker, grittier chapter of the TMNT saga rather than passing through it. For fans who've followed the Last Ronin story and want to understand where it's headed next, Uno is absolutely a character worth watching.