Get her sign and your sign somehow put together. My son was going to be an Aries but he's a pieces now. I'm saving up to get a piece to fill in my forearm of that and the constellation Orion as that's his name.
I have my daughter's initials and birthdate and will be getting a tattoo of the triceratops, cera, from the land before time because Cera is her middle name. In a few months, I'll be adding my son's initials and birthdate and a star trek related tattoo for him.
For my first daughter (Jasmine) I got a Jasmine flower in girly colors, for my second (Jemma), I got an owl holding a pink ribbon wrapped diamond. My third (Sage), I still have no idea 😩