Red
"I forgot about Fire Nation sunsets when I was living on Kyoshi Island last year," said Ty Lee, gazing lovingly at the sky.
She lay halfway on her back on the palace roof. Azula was silent beside her, not bothering to pretend to listen to the stories Ty Lee told about her time on Kyoshi Island. Ty Lee did not care, because Azula was beautiful and amazing and doing much better these days.
"What makes them different than anywhere else? You are aware that the entire world looks up at the same sun. Or perhaps the sun looks at the entire world. Hm." Azula sat up and Ty Lee studied her closely, intently until Princess Azula snapped, "What are you looking at?"
"I just, uh," and Ty Lee blushed bright red, "I sometimes imagine your face when you're not around. Or I'm not around. Or something like that."
"For the past year, you have seen my face every day," skeptically said Azula.
"Not like this." Ty Lee beamed. "This kind of thing is like half of what I think about."
Azula laughed. Ty Lee nervously laughed with her.
"So, Fire Nation sunsets?" inquired Azula.
"They're red here. Blood red here. It doesn't get that dark where I lived before," said Ty Lee. "It's like the second best thing about being here."
"Red sunsets and…?"
Ty Lee bravely whispered, "Red lips."
She sat up, narrowly missing a collision with Azula's forehead, and crushed their lips together.