Reinhold inked the issue. Starting with Supergirl #4, Mahmud Asrar will be both penciling and inking.
So let the speculation about these shots begin!
First off, I am glad that Superman and Supergirl aren't punching each other in the top left panel. I suppose the panel shows a 'bleed' of Kara remembering what happened on Krypton, thus the half cityscape background behind her.
And I will go out on a limb and say the concerned face in the lower left is Zor-El and not the bad guy Supergirl ends up facing. The art continues to look slick with nice close-ups of Supergirl showing anger, worry, and contemplation.