Maybe she should have expected Eliot to react like that, grabbing Hardison the way he had growling in that tone Parker recognized as the one you didn't mess with, of course she hadn't seen this happening because it was Hardison and he was here and the three of them were going to be together again and it was going to be good.
"Eliot! Eliot stop, it's okay, let him go." Parker said rather than putting herself between the two, since that would be a really good way to get one of them hurt. "It's Hardison, Eliot it's Hardison, he's here - it's okay."
She didn't always think about Eliot's new sight, because he was always just Eliot to her, but here in this situation she could see why this might have been an issue when she thought about it. Since he could only see the shape of Hardison's skeleton, not all of him like she could.