Cathrine's story is a bit of a tragedy:
As part of the Buntha Village, che would come into contact with the city of Oasis and get acquainted with a prominent politician named Agnes, aka Old Nan.
Both Cat and Anges were opposed to Citadel's growing influence in Oasis. In Cat, Agnes saw a valuable partner to stop their growth at the root. But Cat would have to move to Oasis to do so.
Cat's boyfriend wanted nothing to do with Oasis. In fact he wanted to go out on a journey with her, leave the Village and the politicking behind. With their friends gone or settling down, now was the perfect time to do so. But Cat didn't agree.
They both tried to convince the other of their plans. Neither would budge, yet neither wanted to be without the other Eventually they knew they had to go their separate ways. And after a final day and night together, they did just that. Not seeing each other again for many years.
9 months after that final night, Kyara was born and Cathrine became a mother. Now living full time in Oasis city, and a ranking member of its Guardian Corps under the leadership of Agnes.
In the years that followed, Cat fought a losing battle against the growing influence of the Citadel, while trying to raise Kyara to the best of her abilities. She would tell her stories of her past adventures, but never of her father or being a Buntha. The memories of him being too painful.