Ryn

Planerider Ryn is a tiefling member of the Arcana Pansophical who studies planar travel and arcane ley lines.

Background
Ryn studied under Yurek Windkeeper, founder of the Arcana Pansophical, and became a specialist in planar travel and arcane ley lines. By 812 PD, she was a Maker of the Pansophical, a higher member responsible for oversight and enacting judgment. She often travels between the realms to complete her research. At some point, she gave a Spell Scroll of Plane Shift and a tuning fork attuned to the Elemental Plane of Fire to Yussa Errenis.

Campaign 2: The Mighty Nein
While fleeing from the Cerberus Assembly in, the Mighty Nein used the Spell Scroll gifted to Yussa and found themselves in the Plane of Fire, inside what appeared to be a field lab belonging to Ryn. There they found Ryn's notes pertaining to the Planes of Existence, which theorized about potential shifts in planar structure and perhaps even dramatic changes to the cosmos.

Campaign 3: Bells Hells
Hondir mentioned Planewalker Ryn to Bells Hells as a member of the Grim Verity who was particularly skilled in inter-planar travel.

Appearances and mentions

 * Campaign 2
 * Campaign 3
 * Campaign 3

Trivia
In the Talks Machina Special 3: Critical Role Campaign 1 Wrap-up, Matt said that one of the members of the Arcana Pansophical was developing a portal connected to the Nine Hells. Since they needed demon parts for this ritual, they contracted with the Slayer's Take to find a rakshasa and harvest his parts for them. This task was later assigned to one half of Vox Machina. Planerider Ryn, as the planar specialist in the Arcana Pansophical, was the most likely person interested in a portal between planes or tasked with making one.