now that i thought about it, i think the person would most
likely die is snape. he used to be a death-eater. according
to hp4, he didn't think voldemort knew that he had turned
against his former lord, while voldemort, however, did know.
dumbledore asked him to spy again and i think he got killed
this time.
.........
"severus," said dumbledore, turning to snape, "you know what
i must adk you to do. if you are ready ... if you are prepared ..."
"i am," said snape.
he looked slightly paler than us