The thing about the Crystal Catacombs is that they are beautiful but they are quiet and lonely. It leaves Sokka alone with her thoughts and that is the exact opposite of what she needs at the moment.
She tries not to, but she thinks.
First she thinks of her mom. Kya, the kindest most beautiful woman of the Southern Water Tribe. Sokka's still remembers when she died. Katara was given her mother's necklace and Sokka was given her mother's responsibilities. She started helping the women more with the chores. That lasted for awhile and when Katara got old enough, she started helping too. Then after the men left for the war, Sokka got even more responsibilities. Katara helped take care of more things around the village and Sokka ventured out to get fish and other food for the people.
Thinking of the men leaving for war reminds her of her father. Chief Hakoda was one most inventive of the Southern Water Tribe chief, and he was also one of the bravest. While he had a pretty small crew, he always evaded capture and was very successful in all he decided to do. In fact, probably his only failure was not having a son. Sokka was sure that her father was proud of his youngest daughter who had now already mastered water bending at the young age of 14. But what had Sokka done that Chief Hakoda could be proud of? The people she tried to protect died. She was foolish enough to get captured. There was nothing she's done that would make her father proud. It was one of the reasons she had let Katara be the one to go see their father.
And then she was thinking of Katara. Her sister was someone who Sokka constantly compared herself too. And yet she couldn't bring herself to think anything negative about her sister. Katara had been by her side for her whole life, and she loved Katara with her whole heart. Sokka wanted nothing more than to know that her sister was safe and happy. After the death of their mother, it seemed like it would be hard for Katara to be happy again. Sokka could always manage to get Katara to smile, but sometimes it seemed like making her smile and laugh wasn't going to keep her happy forever. But seeing Katara become a water bending master and watching her grow was something that Sokka loved. In fact, Sokka would risk getting captured over and over again if it meant that her sister could keep going on the path that she was on.
And then there was Suki. The girl who helped Sokka realize that she could be more than just what she thought she had to be. If it wasn't for Suki, Sokka would probably been captured a lot sooner than now. Suki taught her to fight, but more than that Suki taught her that she could be more than what Sokka ever imagined she could. And now where was she? If those Fire Nation girls were impersonating the Kyoshi Warriors, where were the real things? Could they be trapped somewhere in Ba Sing Se like Sokka was, or were they in some Fire Nation prison? Sokka had no clue.
There was another person who Sokka had no clue about and that was Jet. Since it had happened so recently, she could still remember almost even little detail. But there was one part that kept replaying in her mind, their kiss. Jet had been Sokka's first kiss in what felt like years ago but had only been months. The way he had kissed her the first time had been rough and rushed. By the time she met her first love, she had forgotten all about the leader of the Freedom Fighters. But then he came back in her life so suddenly that it brought everything back. And their last kiss had been so different from their first. It was gentle and sweet and smooth and so so sad. Sokka sat there and still couldn't believe that all that had happened. It was always hard to see someone die, especially when you had history with them.
That train of thought led her right to Yue. The princess was the first person Sokka ever told her fears to, and she was also the only one. Yue was also the first person Sokka loved. Sokka had been left with a streak in her hair and a hole in her heart after Yue disappeared.
Sokka sighted and looked up towards the ceiling. She didn't even know if the moon could be seen from here. She wiped at the tears that had begun forming in her eyes, and hoped that she would be saved soon.