Not names, like two matching pictures or sm. And this chapter has mentions of Miscarriage so, if you're sensitive to that sort of thing, skip Ryushot.

Todomomo

Maybe. It really depends. If they got one, it'd be the names of all their kids cuz they mean the most to them. Momo would have it on her back, Shoto would get it on his arm or sm.

Kirimina

No. Mina doesn't know what would look good on her. It would look weird when he hardens.

Miruhawks

Yes. They'd get something like Dove's birthday.

Iidamei

N O

Kamijirou

Yes. Both of them are related to music. Like a music note on their shoulders. Or their pinky fingers.

Dabi x Toga

No. He doesn't have many places for the tattoos to go. She'll totally get something dumb like 'Garlic Bread'

Nejitama

No. Too scared of needles.

Mt.Kamui

No. He's a tree.

Ryushot

Yes. They have January 5th tattooed on their backs. Angel wings and a halo. They lost a baby and the date they lost him/her was January 5th. Ryuko has it on her back, Shinya has it on his left shoulder.

Yeah that got depressing.

Reiko x Shinsou

Yes. It's a small ghost family. Three ghosts, one is tiny to represent their daughters.