The High Priestess- Steena
Okay, so Steena isn't an anime character, strictly speaking. But some video game characters, especially those from Squaresoft, are so interesting that I had to include them. Steena doesn't have a standout personality, but she's the most obvious priestess character I've come across. This card represents nonaction, unconscious awareness, potential, and mystery. Steena is certainly calm and capable of seeing beyond everyday reality.