(Todd has done all my tattoos)
Our tattoos are the Celtic symbol of sisterhood which we placed on our sides.
That one hurted a bit more than the others I got in the past.
Great idea to get a sisterhood symbol for you and your sister.
Inside of Celtic patterns, sister is frequently represented using a triquetra or simply a triskele.
Sisterhood layouts in many cases are interchangeable. Both of them represent the trinity.
It is not usual any more for girls to get numerous sister representations.