Leonardo

Leonardo is the blue-masked leader of the Teenage Mutant Ninja Turtles in IDW Publishing's celebrated run, a mutant terrapin trained to the peak of ninja perfection under the tutelage of Master Splinter. Calm, disciplined, and fiercely devoted to his brothers, Leo stands apart from his siblings through an almost spiritual dedication to bushido — the way of the warrior. His dual ninjato are extensions of his will, and his mastery of swordsmanship, stealth, and unarmed combat make him one of the most formidable fighters in the IDW universe. Collectors know him by aliases that speak to his legend: the Ghost of the Jungle, earned during harrowing solo missions, and Splinter Jr., a nod to how deeply his master's teachings have shaped him.

IDW's reimagining of the TMNT mythos gave Leonardo a richer, more complex interior life than many previous incarnations. His tenure within the Foot Clan — taken under Shredder's control — became one of the most emotionally charged arcs in the entire run, forcing his brothers and Splinter to confront the question of whether the Leonardo they knew still existed beneath the enemy's influence. That storyline sent key issues skyrocketing in collector demand. His connections to Dimension X, the Intergalactic Wrestling Federation, and even the Power Rangers crossover event further expanded his footprint across some of the hobby's most sought-after team-up and limited series books.

Leonardo's first appearance traces back to Eppo #197907 from 1979, a historically significant entry point that predates even the landmark Mirage Studios debut most collectors associate with the Turtles' origin. This makes early Leo appearances particularly compelling for serious TMNT historians and variant hunters alike. Within IDW's continuity, his debut issues and key story milestone comics have proven to have strong back-issue legs, consistently moving at conventions and on secondary markets.

For collectors, Leonardo represents the cornerstone of any serious TMNT library. His leadership role means he anchors nearly every major arc across IDW's long-running ongoing series, crossover events, and limited series tie-ins. First prints of his most pivotal issues — particularly those covering his Foot Clan captivity and his Dimension X adventures — are genuine finds. Whether you are building a complete IDW TMNT run or cherry-picking the highest-impact single issues, Leonardo's books are essential, enduring additions to any collection.