Character from Re:Zero by Tappei Nagatsuki
The ancient Sage who planted the Flugel Tree and sealed the Witch of Envy — everything connects back to him, and he may be Subaru from another time.
Flugel is the series' most important unseen character. He was the Sage who, alongside the Dragon Volcanica and the first Sword Saint Reid, sealed the Witch of Envy 400 years ago. He planted the Flugel Tree, created or influenced many of the world's magical systems, and left traces everywhere Subaru goes. The theory that Flugel IS Subaru — sent back in time or existing in a previous cycle — is supported by enormous circumstantial evidence: Shaula recognizes Subaru as her master, the Pleiades Watchtower responds to him, and Flugel's known personality matches Subaru's. If true, it means Subaru's entire journey is a loop, and the boy who keeps dying to save everyone may have already saved the world once before — and forgotten.
Almost no confirmed visual details. Historical accounts are fragmented and contradictory. Planted the massive Flugel Tree as a landmark. His appearance is deliberately kept mysterious by the narrative.
Also known as: Flugel, The Sage, The Great Sage