Luna has grey eyes like fog and hair that she hasn't brushed in a week. Her boyfriend's name is Rolf Scamander, except not really; they're not "dating" and they never will. They just fancy each other a lot and that's all.
One day they go on a walk. Spring has noiselessly arrived and at the edge of the woods, there are wildflowers growing. Rolf kneels down and picks one from the patch and tucks it into Luna's hair and she kisses him, gently. And when he pulls away he presses a silver band to her palm and says very quietly, "You and I should get married, don't you think?" Luna smiles and that's that and it's their love. And their love is as simple as any could be.