Question for the hivemind

I need to figure this out for the next scene, but the characters are not being helpful. If your best friend died, and you were to get a tattoo to remember her, what would it be? Obviously it would depend on the people, but again, no help is forthcoming there. The characters are not helping--I am looking for concrete suggestions.

ETA: "You" in this case being an early-twenties punk chick. Perhaps an important distinction.

Help me pick a design and you win a cookie. Suggest something so awesome I'd get it done when I finish the book and you win a spot in the acknowledgments. Or a bigger cookie with extra chocolate chips.