As much as V doesn't want to get close - because it seems like they'd both be affected, then - Leo definitely seems like he needs an intervention.

A moment's search turns up a decently-sized branch, which V then throws - not at Leo, but into his field of vision.

And they're still looking for more overt signs of attack relating to the tree.

"I'm not sure what's slowing your reactions like this, but it can't be good for you."