He doesn't entirely trust Elrond's self-assessment, but if Elrond can stand and keep up, it will have to do until he can find a healer to find out what is actually wrong besides grief. The twins are still giving him dark looks, he's pretty sure his side is all the colors of the rainbow and possibly bleeding (Valar know he won't be taking the time to check until they are safe again), and Celebrian...

He has seen Elrond do some fairly amazing things, he knows. He reminds himself of this as he gently scoops her into his arms, reassuring her in a soft litany of words that has more to do with letting her know he isn't an orc than with seeking an answer.

He has been called the lord of the seen and unseen... and he's sure the twins can't see it, he's not sure if Elrond has let himself see yet, but she is so very injured.