Henry Ducard (Earth-1638)

"When I found you in that orphanage, you were lost. But I believed in you. I took away your fear, gave you new purpose, and I showed you a path. You were my greatest student. It should be you standing by my side, saving the world."

- - Ra's al Ghul to Matt Murdock

Henry Ducard is Ra's al Ghul, the immortal leader of the League of Shadows and a former student of the Order of the Crane Mother. After seeking the power of immortality in K'un-Lun following the death of his family, Ducard sought to eradicate crime and injustice from the world, creating the League formed of multiple former K'un-Luans and individuals tired of misery. He became the trainer of Matt Murdock, a superhuman blind boy, whom he trained and taught to use his other senses. Murdock ultimately betrayed Ra's, not wishing to take part in a genocidal crusade.