It’s Nymphadora’s patronus that finally makes Remus give in.
They’re on patrol one night, making rounds around the outskirts of Hogsmeade when the chilly night turns icy and unreal. It feels as time itself had stopped. Remus knows the fog rising inside his mind, knows whose voices will come with it in a few moments if he does not do anything. It’s almost like the Dementors are luring him into their presence, if it was not for the unbearable cold. Remus closes his eyes, awakening memories he keeps locked securely at the far back of his mind.
“Look at you, Moony,” James says, laughing. “You’re always cold, aren’t you?” Peter hurries over and awkwardly places his spare blanket on top of Remus’s head. And as he fights his way through the blankets, Remus is smiling. His eyes meet Sirius’s, and Sirius grins.
He can feel his Patronus taking form in his subconscious but Tonks is quicker. “Expecto Patronum!,” her voice rings through the air. And a huge creature bursts from the tip of her wand, glowing brightly and illuminating the night with silver light. A heartbeat passes and the werewolf is joined by a big, shaggy dog. The Patroni seem to acknowledge one another’s presence and they run through the night side by side, filling Remus with warmth and a sense of security. And there is a painful longing, as he watches the werewolf and the dog for these two have always belonged together.
Remus and Nymphadora go back to the village hand in hand.