User blog comment:B214/Question and Answers 4/@comment-120.20.128.230-20141007071346/@comment-24866657-20141009052746

Your question is is it possible to revive someone without their Sacred Gear and I use fact from canon to answer you. Simple. Remember this is Valerie with only 2/3 of her Longinus while yours is the entire Sacred Gear.

Right Valerie is not that bad... Since she's only stuck in comatose and could do nothing to contribute to the battle or even participate in daily life. And that's still her with 2/3 Longinus, not the case of losing the entire Sacred Gear.