Xenophilius Lovegood
Quote 1
Xenophilius looked ghastly, a century old, his lips drawn back into a dreadful leer.
"They will be here any moment. I must save Luna. I cannot lose Luna. You must not leave." (21.85)
Xenophilius Lovegood here demonstrates the desperation of a distraught parent – he loves his daughter more than anything else, and is willing to turn Harry over (despite the fact that until now he's fully been on Harry's side) in order to ensure Luna's safe return.