Ayase wields the Device Hizume, which takes form as a red shirasaya that has a scarlet blade described as redder than sunset and more vivid than blood.

Her Noble Art, Mark of the Wind, allows her to cut through space using Hizume which effectively leaves behind a vacuum blade. These blades are activated when Ayase points down Hizume and taps on the handguard using her little finger. When triggered, it unleashes a sharp gust of wind that slices through the openings created by Hizume.