I have a playthrough where I start out with the intention of staying loyal to Kaija and I am in love with her. (In fact, this was my very first time through) I was grateful for the rescue but my eyes were opened during the conversation with MC's mom, sister and Kaija at the dinner table. That conversation, for me, becomes confrontational, with MC wondering if Kaija ever really cared about him. Later, at the Templar base, when Linnae tells them to talk it out, Kaija is the one who becomes confrontational until MC sows the seed of doubt about the role she has played. In that version of the (my) story MC tells her they need to take a step back. In other words, he dumps her. I made up my mind she'll need to regain MC's trust to be a friend and ally but the romance is over and MC moves on.
This is one of those rare AVN's where I feel compelled to do multiple playthoughs because it is so well written and the choices actually make a huge difference. Of course, I now have many playthroughs, including one where I forgive Kaija and we stay together. I just enjoy playing Kaija hater in this thread...