"To take care of Miss Hermione," said the elf, hopping up onto the bed. "All elves be wanting the job of looking after Master Harry's favouritest witch, and Master Harry be picking me, even though I be one of the youngest. No job in the world more important to Master Harry than that. He be wanting to do it himself, most probably, but because he cant he had to choose very carefully for the elf to take care of his favouritest witch. And he be picking me."