Aoiro Genmu

Aoiro Genmu (青色幻夢, Blue Fantasy) is a Noble Art of Shizuku Kurogane.

Description
Aoiro Genmu is a Noble Art, that lets the user make themselves invisible by using water to refract light. It's possible that the technique can be used on multiple people. Though it is very similar to Stella's Flame Veil, although not as versatile.