"24 Subtle Disney Tattoos" (This one is from Alice in Wonderland.) Several more great ones at the link, too.
Zodiac star constellation for wrist tattoo
Moon Tattoo- if i ever got the courage to get a tattoo it would be this
31 Insanely Cool And Adorable Matching Tattoos For Twins (I'm thinking even just for siblings some of these could work, and even for best friends ^_^ )
40 Creative Best Friend Tattoos, http://hative.com/creative-best-friend-tattoos/,
BEST FRIEND TATTOOS!!!!
Another best friend tattoo
50 Cute Small Tattoos for Girls | herinterest.com
24 Stunningly Subtle Disney Tattoos I won't get a tattoo, but I thought these were cool.
Favourite Things | 16 Minimalist Tattoos That Celebrate Nature And The Outdoors