A while ago, someone on Tumblr pointed out that Zuko never knew the Gaang's names for some time. This is based on that post.

Zuko, what's my name?

Fate hasn't always been in the gang's favor. Through their journey of finding Aang in the iceberg to meeting an awkward Zuko, they've had numerous ups and downs. So, it was wild when Zuko tried to convince them that he's on their side. No one saw it coming. Especially Sokka.

In general, Sokka was a very analytical person. Always bearing the responsibility for the safety of the group, for keeping them on track, and for coming up with innovative ideas to escape life-threatening situations. Of course, the most important thing, being the one who kept things light.

As far as his calculation went, Zuko could not be trusted even though he had surprisingly turned out to be useful. He'd been skeptical ever since Zuko first showed up. Neither Appa licking him with joy nor Toph's feeling that he wasn't lying could convince Sokka. Sure, Zuko had won his trust a teeny-tiny bit by helping them against Combustion Man, so Sokka gave in and decided to let Zuko teach Aang fire bending if it meant sending the plan into motion to defeat the Fire Lord. That was the only thing that mattered for Sokka.

Still, something was bugging him. Right after everyone had agreed to let Zuko stay, he realized something when they were having lunch, something weird.

Then, again during dinner, when they were sitting around the fire, he noticed the seemingly increasing weirdness of the situation. As soon as he had taken his last bite, he decided to speak up.

"Guys…" he started calmly. "I think we need to address the elephant in the room," he declared, grabbing everyone's attention.

"What elephant?" Aang asked.

"It's called a Bison," Toph commented.

"I KNOW WHAT A BISON LOOKS LIKE!" Sokka screeched, before he cleared his throat, "I'm talking about him!" Sokka pointed at Zuko.

Katara rolled her eyes.

Aang raised his eyebrow. "I think we have already established that he is part of the group now, Sok-"

"Stop!" Sokka shook his head. "No, no, no. Don't say my name!"

"But So-"

"DON'T SAY MY NAME!" Sokka screamed.

"What's with him?" Aang whispered in Toph's ears, feeling defeated, and Toph shrugged nonchalantly.

Sokka stood up to face Zuko. "So…Prince!"

"Uhh…" Zuko curled his upper lip. "Yeah?"

"What is my name?" Sokka squirted his eyes.

Toph laughed. "I think Combustion Man got to his head."

But Sokka didn't budge. "The fact of the matter is, I haven't heard him call any of us by our names. It's always The Avatar or The Bison." He said, impersonating Zuko as he stepped closer to him. "What is my name, Zuko? See? I just said your name! It's not that hard."

Katara growled, growing impatient, but chose to stay silent, just like Haru, The Duke, and Teo, who were also witnessing the whole thing while eating their dinner.

Zuko let out an awkward laugh. "Lee?"

Everyone gasped.

"SEE!" Sokka pointed at him again. "I KNEW IT! THIS GUY DOESN'T KNOW OUR NAMES!"

Hearing this, Toph sat up. "Wait, really?"

"But you've been following us forever!" Aang added.

Zuko scratched his cheek. "Uhh…You guys never really told me your names."

Aang slowly shook his head in disbelief, "And you decided to just roll with it?"

"It was very awkward this morning," Zuko argued. "You know, with the assassin trying to kill everyone? Then you guys went to do your own things. I thought it was too late to ask."

An awkward silence took over only to be broken when Sokka cracked up. "And to think he followed us around the world!" He snorted. Toph and Aang joined in while Haru, The Duke, and Teo softly chuckled.

"Who do you think Appa is?" Sokka hollered.

"Is that the Earth Bender or the Bison?"

Sokka laughed even more. "Holy waters!" He wiped away a tear. "Can you guess who Aang is?"

"Ugh…"

"Who…Oh Spirit! Who is Sokka?"

"The…Avatar?"

"Hahaha! Who are these extra people then?"

"I'm seeing them for the first time…"

"Okay, guess who is the grumpy girl with the hair loopies?"

"The waterbender…"

"Don't drag me into this," Katara spat.

And just like that everyone else laughed, breaking the ice. Maybe Sokka trusted Zuko a little more now.