Ok so besides Klaus seeming to float, he is also the only one holding the umbrella with the handle facing up. This might just be a nod to his individuality (like with the pink umbrella as opposed to the black one everyone else is holding), but I've got this HC that while they all lost his powers, his connection to the void is there. If he were to die, maybe he could actually rematerialise himself back in their original timeline in s1. Also, it could be a reference to how he's always stumbling onto the plot hook and letting the audience figure it out before any of them.
Then there's obviously Five holding it in his left hand - which fair enough, he is left-handed. But so is Klaus, so why isn't he holding it in the left? I feel like there's more to it, maybe he's the only one actually pushing the drive to restore their powers? Maybe to highlight his restored missing arm?
Diego also decided to hold his umbrella weird, almost like he's ready to use it as a weapon. He's always been a little tense, can't imagine he's any better with a baby to watch out for.