Team Jeff!
As much as Emma wanted to keep tabs on Snow, to make sure nothing happened, she stuck exceptionally close to Jefferson as they made their way to the portal, stopping to keep things away from him as he stood under the tear.
The burst of light, and yet more demons, drew Emma's attention away from Snow and Hook, raising her gun to fire off at the wings of the flying ones to make sure none swooped towards Jefferson, "But it closed a bit, it's getting smaller, keep going."
She'd watch out for anything coming, he'd get the portal closed and then they'd help Hook and Snow with the straggling demons still around. She focused her power to toss another fire ball, this time mostly for distraction at the other monsters. She couldn't break away from him to get close to them, it just wasn't a risk she was willing to take in the least.