One Piece: The Holy-Winged Admiral, I Am Sanguinius

The Vengeful Spirit: Sanguinius, the angel who was killed by Horus, passed through a warp rift and arrived in the world of the Pirate King, where Garp adopted him.

Garp: “Wahahahaha! As expected of my son!”

Sengoku: “This boy has what it takes to become an admiral~”

Zephyr: “That's my good student!”

The Three Admirals: “Sanguinius? He's a symbol of the Marines~”

And so Sanguinius, the Primarch from Warhammer, father of the Blood Angels and the Great Angel, plunged headlong into the world of pirates.