Team Anna!
Taking place with Ariel at the front Isaac made a point of stretching out his sense as much as possible. They weren't as keen as they should be, but he could still push them past the point of a normal humans, which wasn't entirely pleasant right now, but would probably prove helpful.
At Ariel's question, he took in a deep breath through his nose, fighting back the flinch at how bad that actually was; "There's a group of them just by the portal I think," or close enough to it, "I can hear some to the right, they... they're breaking things so I think they're distracted by that at least." The less attention they got, the better.
"They're fighting with each other." And they probably would until something better came along, something human maybe. Flexing his claws, Isaac clenched his jaw in determination before sparring a small glance at Ariel with a slight smile. Hopefully encouraging. "There's not too many," at least if the heartbeats he could vaguely make out was something to count off, "Six or seven where we're heading."
Which definitely meant that Anna should stick safely between Loki and Elsa.