Ken Mack

Ken Mack, known as Mettle, is a teenager with a metal exterior who was recruited into Avengers Academy, a program designed to train young people with turbulent histories and dangerous powers before they could become threats.

Ken Mack arrived in the pages of Avengers Academy in 2010, a Modern Age Marvel creation shaped by the sharp collaborative talents of Christos Gage, Ed Brubaker, and Mike McKone. His debut in issue #3 carries collector-significant weight, and his appearances across Avengers Academy, Avengers Academy: Second Semester, and Ant-Man & Wasp place him squarely in one of Marvel's most compelling corners of that era. He keeps vivid company with the likes of Mettle, Hazmat, Finesse, Jennifer Takeda, and Jeanne Foucault — a roster that made Avengers Academy feel genuinely fresh and unpredictable. Fifteen catalog appearances make him a focused, purposeful presence rather than background noise, and for readers who prize that early 2010s Marvel energy, Ken Mack is absolutely worth tracking down.