For a brief time while Sokka's orienting herself when she wakes because of the attack, she catches a glimpse of Zuko practically tackling her sister to protect Katara from falling rocks. She almost feels jealous, which she almost has a crisis about, but then she watches Katara get mad at Zuko.
Another bombs shakes the temple and Sokka decides to get her head out clouds and help with the escape plan. Zuko runs off to deal with his sister and Sokka tries to get her sister and the Avatar to get out of the temple. The whole group ends up having to separate. It's hard to say good-bye to her father so soon, but Sokka knows there is not much of a choice. Sokka, Suki, Toph, Katara, and Aang escape on Appa while the others escape on the airship. They manage to save Zuko after he and her sister fall off the ship, and Azula saves her herself.
The group that got away ends up camping and Aang points out that camping makes it feel like old times. Zuko makes a joke about chasing them around. It obviously rubs Katara the wrong way. Sokka tries to lighten the mood by toasting to Zuko, but it just upsets Katara more. Katara walks away and then Zuko follows. Sokka finishes her drink and then follows after. She's not sure which of the two she's more worried about. She overhears the two fighting, but stays out of the way.
"This isn't fair!" Zuko complains. "Everyone else seems to trust me now, even your sister! What's with you?"
"Oh, even my sister trusts you now!" Katara says furiously. "She's not the best judge of character, remember?" Sokka takes offense to that. "She was the first person to trust you, way back in Ba Sing Se! And what happened there?" Katara pauses. "You turned around and betrayed her, and I'm sure you'll do it again. You'll betray all of us!"
Zuko closes his eyes. "What can I do to make it up to you?"
"You really want to know? You can start by apologizing to Sokka." Katara stops for a moment, acting like she's thinking about something. "Hmm, and then maybe you could reconquer Ba Sing Se in the name of the Earth King. Or, I know! You could bring my mother back!"
Katara storms away, laving Zuko. Sokka sneaks off behind her a few seconds later, following after Katara.
Sokka finds Katara in her tent a little later. She doesn't want to give away that she has been eaves dropping, so she comes up with a different reason as to why she's bother her sister, one that isn't completely false.
When she first comes in, Katara glares at Sokka. "What do you want?"
"I wanted to know if I could sleep in here with you tonight." Sokka says holding up her blanket. "It seems like it's been a long time since we've shared a tent."
Katara smiles, but still seems suspicious. "That's the only reason?" She asks raising a brow.
"Don't think I'm weird," Sokka says sitting down. "but today when Azula almost died, I got worried about you."
"Worried about me?" Katara asks, clearly confused.
"Yeah. Zuko almost lost his sister," Katara bristles at the mention of the fire bender. "And it made me realize how many times I could've lost you. Even way back before Aang came into our lives. Like when I left you alone when the tribe was attacked and mom-" Katara cuts Sokka off by practically tackling her with a hug.
"Alright, alright, you can stay." Katara says when she lets Sokka go. "Do you wanna call Suki and Toph and make it a sleepover?"
Sokka shakes her head immediately. "Sisters only." She says with a grin.
Zuko decides to break the sisters only rule when he breaks in while Sokka is changing. She about to yell at him to get out, but she remembers Katara who is already asleep. Zuko's whole face turns red and he leaves. Sokka quickly ties her shirt up and goes after Zuko. She forgoes the pants part since the shirt is long enough.
"May I ask what you're doing sneaking into my beloved younger sister's tent in the middle of the night?" Sokka asks when she finally catches up to Zuko.
"I went to your tent first." Zuko says, not looking her in the eye.
"So you have a thing for Southern Water Tribe girls?" Sokka asks with a smirk.
"No!" Zuko says, face flushing.
"Well now I'm hurt." Sokka says with a frown. "You don't think I'm pretty?"
"I didn't say that!" Suddenly Zuko does make eye contact with Sokka, and she feels herself start to blush. "You're very pretty Sokka, beautiful ev-"
"Woah-kay, Sifu Hotman-"
"Only Aang calls me that." Zuko grumbles.
"Yeah, yeah," Sokka says rolling her eyes, "What were you looking for me for?"
"I wanted to apologize-"
"I forgive you." Sokka says interrupting Zuko.
"I didn't even say what I was apologizing for." Zuko frowns.
"Well, you did a lot of things to me that you should apologize for." Sokka says with a shrug. "There was the first time we met and you tried to take me prisoner, the time you and those pirates captured me, that whole mess in Ba Sing Se, I mean, there's a pretty long list, I assume it was just one big blanket apology for your actions against me."
"Oh." Zuko pauses. "Yeah, I guess it was one of those."
"Well, you're forgiven." Sokka says with a grin. "But I'm sure that's not the only reason you're here. So what's on your mind?"
It ends up being about Katara. Zuko ends up asking about the day their mother died, and even though it's a painful memory, Sokka tells him about it. Afterwards, they split ways and Sokka goes back to Katara's tent to sleep.
The next day Sokka wakes and finds Katara gone, and sees that her sister must have packed some of her things away. Sokka journeys off to find her, but not before grabbing something to eat. She ends up getting distracted by building a flower crown with Suki, but then she remembers what she was going to do.
She finds Katara, Aang, and Zuko by Appa. Sokka hears Katara say that she's going to find the man who killed their mother. And then Zuko reveals that Sokka told him what happened. Aang and Katara have a little disagreement, and Sokka surpassingly finds herself agreeing with Aang. Of course, when she voices her opinion to Katara, her younger sister accuses her of not loving mom the way Katara did. Sokka can't believe Katara would say that so she storms away.
That night Aang lets Katara and Zuko go off on Appa to face the murderer of their mother. It leaves Sokka, Aang, Suki, and Toph in the group.
It's an interesting mix.
Suki, Sokka, Toph, and Aang end up making more of the cute flower crowns. Toph gives up and makes a stone crown instead. Aang makes Katara a crown after he finishes his, and it inspires Sokka to make one for Zuko too. Suki makes one for Momo and then they all team up to make a big one for Appa.
Toph also makes Aang practice his bending and during that time Suki and Sokka spar. It's a good time, but it exhausts Sokka.
She's glad for it though, because it keeps her from thinking about Katara and Zuko.
Eventually Katara will tell her what happened with the whole mess, but the evening when Katara comes back, Sokka's just happy to see her sister.