Q: Passage: During the four-part series finale, Katara assists Zuko in preventing Azula from becoming Fire Lord and battles her; eventually defeating her, she heals Zuko. When the war ends, she is seen in Ba Sing Se with the other protagonists and she finally shares a passionate kiss with Aang, starting a romantic relationship with him.

Question: Based on this passage, who does katara end up with in avatar? Let's give stream of consciousness first:
To answer the above question, the relevant sentence is: When the war ends, she is seen in Ba Sing Se with the other protagonists and she finally shares a passionate kiss with Aang, starting a romantic relationship with him. Therefore, the final answer is Aang.