The red-haired warrior was a key member in the rebellion against Decarabian in Old Mondstadt. He was friends with the Nameless Bard, the wind spirit who would become Barbatos, Amos, and an unnamed knight (possibly Gunnhildr).
The red-haired warrior was a wanderer and eventually came to live in Old Mondstadt under Decarabian's dictatorial rule. Discontent with the god's reign, he was one of the first to plan the resistance against the God of Storms and used the secret sign of Windblume to communicate with like-minded people.
Around 2,600 years ago, with the aid of Gunnhildr and the Gunnhildr Clan, a full-scale rebellion rose up in Mondstadt. Alongside the Nameless Bard, the wind spirit, Amos, and the knight, he stormed the terror and confronted Decarabian personally. Decarabian was slain in the ensuing battle, but the Bard and Amos were fatally wounded as well; the knight props up the Bard as they witness the fall of the old god.
With the death of an old god in the midst of the Archon War, and with Decarabian's rival Andrius choosing to pass over the position, the elf was selected as one of The Seven Archons and ascended to godhood, assuming the name Barbatos and the form of the late Bard. For reasons not completely clear, the red-haired warrior then turned his back on Barbatos.
It is heavily implied that the Ragnvindr Clan are his descendants, though the clan takes its name from Ragnvindr, who — like the red-haired warrior — raised the flag of rebellion against the tyrannical aristocracy 1,600 years after the fall of Old Mondstadt.
- Players originally assumed that the knight in Amos' Bow was the red-haired warrior, as The Boy and the Whirlwind and Amos' Bow both only depicted four people in the group that led the rebellion, including one with distinctive red hair. In Version 1.4, the description for Windblume Ode referred to him as the red-haired warrior. In Version 1.6, Freedom-Sworn made the rebels a group of five with the red-haired warrior a separate character from the knight, leaving the knight's identity a mystery. Considering Gunnhildr's involvement in the rebellion was only brought up in the Biography of Gunnhildr up until this point, she may have been retroactively added into the group.