IOとは、1st PLACE株式会社製のVOCALOID3「IA（IA -ARIA ON THE PLANETES- ）」を性転換（女→男）した二次創作キャラである。
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![fish, dannyphantom, danny / [Collab] He's a fish, your honor](/proxy/i.pximg.net/c/250x250_80_a2/img-master/img/2025/05/20/02/32/22/130602431_p0_square1200.jpg)
