Adena’s face. Full of confusion. She probably thought she was imagining things because how in the world would Kat be there.
And Kat, she is suddenly so shy. She was focused and determined a second before, only one thing moving her: finding Adena. But now she did, she is back to being vulnerable again. It is the first time they see each other after Adena left, and even though they were planning on trying to make things work now the situations is all kinds of messed up and Kat doesn’t know if Adena wants her there or how she will react. So she just stays there, looking at Adena with the love and adoration she can no longer hide, but a little bit of caution, waiting to know how Adena will react to seeing her there.
But then Adena grabs Kat and with that small act, Kat knows they are on the same page. That Adena is happy to see her, so she relaxes again.