I've been waiting for so long for this too! My storyline was done but I use previous save before the boss (tavi campaign) for previewing all the endings and since kait aren't available to recruit for 2 years, I keep it unfinished for long time and just go on side NPCs stuff. I feel so bad for her as well unfortunately she's the most undertreated character or clearly most forgotten lol
She also has the best art on original pack rahi made which holds till now and she's pretty cute too