One-shot

Rosé thought the whole soulmate thing was bogus, considering the universe happened to match her up with the most immature person on Earth. Lisa, knowing that her drawings would be etched on her soulmate's skin, had a habit of drawing inappropriate and silly phrases and pictures to purposely annoy them.

Or a soulmate AU where whatever you wrote on yourself would appear on your soulmate's skin and Lisa was a child.