For the first week he’s in the house, no one sees hide or hair of him. He’s got his own room, a rarity for a house stuffed full with people. Hermione herself sleeps with Ginny and occasionally Luna, and he doesn't leave the empty little room that Hermione knows is there. Someone brings him meals and he sometimes eats, but not always. Hermione watches a lot. She doesn't even realise she is, half the time.