Elissa wakes fairly content. She frowns at Sven's continued labored, if steady breaths. "I don't know what we expect to find, but I'm beginning to think our time would be better served just waiting here so I can tend to Sven."

Spoiler: OOC
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Mechanically, Elissa can "provide long-term care" to Sven without risk of failure (if we're not interrupted). He may be the best source of information we have, if we can get him to wake up.

I suppose, if it's a hit point issue, Elissa can also just cast some cure spells.