Summary
Locomotress Agnes is the Frozen Trainyard boss and one of the game's more movement-heavy set pieces.
How the fight goes
The encounter is built around a moving train sequence, so the important skill is staying composed while the environment shifts underneath Mina.
Attack patterns
Expect chase pressure, rail-based movement, and windows that open only after you hold your position through the movement.
Spoils of the fight
Defeating Agnes resolves the Frozen Trainyard route and advances the Coltrane Peak progression.