Charles Xavier

Few characters in Marvel history carry the weight — and the legacy — that Charles Xavier does. The visionary founder of the X-Men, Xavier made his debut in the landmark The X-Men #1 in 1963, conjured into existence by the legendary team of Stan Lee and Jack Kirby at the very heart of the Silver Age. Over more than six decades of publishing, he has remained the moral and philosophical center of the X-Men universe, appearing in 1,356 catalogued issues — 99 of them recognized as collector-significant key issues — across The Uncanny X-Men, The X-Men, and X-Men. He shares his pages with some of Marvel's most iconic figures: Scott Summers, Jean Grey, Wolverine, and Logan, a roster that speaks to just how central Xavier is to the stories that defined a generation of comics readers. If you're serious about Marvel, Charles Xavier isn't just worth knowing — he's essential.