To say that Remiel was shocked when Kythia turned out to be a Death Eater would have been the understatement of the year. He was floored. No, worse than that--he was through the floor and hanging out in the basement, where all the spiders of surprise spun little webs of absolute jaw-dropping nonplussment. Presumably to catch the flies of gobsmackery, but that would just be carrying a pun too far.
"Why, Kythia, why?" said the flambuoyant wizard, kneeling at her bedside. "I know that I always brushed you off for my legions of fanwitches, but you were always... *sniff* Always... *sniff, honk, sniff sniff* ...the one in my heart. I should have told you so. I should have acknowledged your advances. Then you wouldn't have turned to...resorted to...."
He collapsed, sobbing, but of course he did so in a very handsome and very photogenic manner.
"That does it!" he vowed, jumping to his feet with a new sense of purpose. "I will make sure you are avenged. I will find the Death Eaters who corrupted you, who took advantage of your tragically heart-broken state to seduce you to their side! As Merlin is my witness, Mr. Waddles will never go hungry again!"
So saying, he tucked the annoyed duck under his arm and left to do things. Grand, important things. Things only a proper custodian of Mr. Waddles could accomplish.