Some more possibilities for tattoo designs...I'm looking at Tantric Buddhist influences at the moment with a focus on scripts and mantras.
This is Siddham script used in Japanese tantric Buddhism (Mikkyo) for the display of Sanskrit characters in mantras, mandalas, inscriptions and the like.
The ones below are, in descending order, the letters used for Air, Wind, Fire, Water, and Earth. "Air" in this instance, unless I'm confused, is "Space" or "Void" in other Asian schemes.
or perhaps, with the elemental colors:
You can ping this entry by using http://www.khephra.org/mt-tb.cgi/292 .