Cullen isn't letting Adella out of his sight, no matter how dangerous it is for both of them. It's as simple as that. With her magic back, as usual, it's both a blessing and a curse, but that's no reason to leave her behind, or to abandon their overall plan for attempting unity. As far as he's concerned, there is still safety in numbers.

After the deaths are announced, he stares up at the sky with a faint frown on his face, arms crossed over his chest.

"Anyone still unaccounted for?" he asks into the air around him. At least they know what happened to Bull.