"Mercury Aqua Mist" is a steam/fog/mist-related attack performed by Sailor Mercury in the manga, Crystal, the live-action series and the musicals.
Manga[]
When she performed this attack, it created a thick fog. In Act 3, Jadeite was able to freeze the fog. In Act 3 of the original manga, Sailor Mercury only performed the attack without saying anything. It was named in the rerelease manga.
Live-Action[]
In the live-action series, it was Sailor Mercury's first attack, and it was offensive to nature. The attack was similar to Shabon Spray, and it created a dense fog.
Crystal[]
In Act 2, when Sailor Mercury performs this attack, blue water energy forms in her hands and creates a thick fog and mist that blinds her enemies.
Musicals[]
In the Nogizaka46 version, Sailor Mercury first used this attack against Zoisite.