A tourist guide who secretly escapes to Earth from Planet Kushia. She reveals her true identity as a Gukuru Shisa to stall Galactron MK2. Her tragic death at the hands of a Galactron serves as the emotional catalyst that allows Riku to master the red steel. The post-credit scene hints at her survival in the Pacific Records.
Airu's sacrifice emotionally triggers Riku's power awakening.
Leito acts as a local guide, connecting the team to Airu.