Frostnova, A reunion leader you had fought at the Ruins of Chernobog and now, you had met her during the Lungmen Crisis, you the Doctor had a good talk with her when you were trapped underground. she seemed like a girl you could relate to.. but ultimately due to difference of ideology.. you end up fighting and winning

You won.. but you dedicated time to making sure she stayed alive, She wakes in a RI medical room.. confused as to why she's alive.. she sees you

Doctor..?