"It must fit since it was in my bags," Sunny replies to Sollux, whose magecraft is apparently logical fallacies. Also, he does not see, at least not in the way she does. 
"An omelette would be good," he agrees absentmindedly. "It has...what is it called again? Protein? Maybe some soup with vegetables would be good too. And some bread, so maybe a sandwich which some more meat in it. For the protein."
...and someone said, 'she likes her suggestions heeded.' Wonder where she got that quality from, HMMM. 
Also, sounds like someone forgot which region they're in, this sounds very North America. Specifically America America, he's like one sentence away from suggesting a healthy burger or something.
He's already tying the jacket around his waist. It looks more ridiculous than if he just put it on. Probably.

Lux's disgusted tone brings Sunny out of his wistful imagination of past and hopefully very-near-future vegetable broths. Yeah. He gives his sister what must be the most deadpan offended look in existence as he replies cautiously, "A bit of tea or coffee is fine, but not too much. Don't get your system used to the caffeine."
He glances at Caster. "Caster, do you like soup?"
Looking for reinforcements now, huh.

He turns his still deadpan expression to her. He's definitely hiding a smug lil smile under there, though. "Is it me twisting his ways within a matter of hours, or is his opinion an indication that you are twisted in yours?"
Sunny 'preciates it, by the way, Caster. Thankees.

His expression is softening as she goes through her reasons, probably because he's actually considering them. "Fine," he concedes.
He's never winning any battle, the way he is. 
"But again, only one moderately sized cup of tea or coffee, alright?" he asks back. 
The recompromiserrrr. 

"Right," Sunny says, heading out the door. At least he doesn't stumble too much. 
Or at least he does, but he ends up stopping by the door when he sees that their new companion hasn't moved yet. "Caster, is there anything else you wanted to see here?"

The mage glances down to his waist, where the jacket is currently tied. "It's a bit of a tight fit with me already wearing one of my own." Plus he can't leave it here, as there's no knowing if they'll return here again on their way back or if they'll part ways with Sollux before that. He has a suspicion that the latter is both the wiser and likelier possibility. 

"We're heading downstairs to see if they have any soup," Sunny agrees, moving out the doorway enough so that Caster will have space to get out too. 
The first meeting didn't go badly. He's satisfied. 

Although the narrator itches for a timeskip (the easier option, all things considered), Sunny still has something on his mind. He doesn't reveal it at first; he mostly trails along as per usual toward the elevator, where he again messes with the buttons.
Only once the elevator starts moving does he look toward the other. "Caster, I can't help but notice I'm doing a lot of leading you around. Are you sure there isn't anything you would like to do?"
His tone is a bit hesitant. Then again, even these few hours together has likely made it obvious that he isn't the most decisive person to exist either. 

The mage frowns, which is probably to be taken as him also not knowing what he means.
"I take what you are saying to mean that you wish to observe, but for whatever reason, that feels very passive to me," he says, rather slowly. Meanwhile, the elevator ticks down each floor they pass. "Is that really all you wish to do?"

"I see." 
The mage turns his head to stare at the ticking numbers, as if pondering what he should say. 
"After today, perhaps you can take the liberty of using the next few days to find your own pace," he says, and then adds, "if that is necessary. I know that you like the place we are based in..." 
The door opens. Sunny trails off, though he didn't sense anyone nearby. Indeed, no one is outside waiting, but he leaves it at that. Yet he doesn't step ahead first this time.  

"We go," he confirms, with a slight nod to indicate the other to lead this time. 

The cafe's pretty easy to find, so there shouldn't be an issue. Right out the hotel's main doors, back to the particularly bright road from the last night. Mostly it's obvious because Sunny makes it pretty easy to figure out where he's going with the way he peers in the direction of where he remembers the place to be. 
It feels pretty safe to cross the roads here. Pretty nice. Sunny just keeps quiet unless Caster wants to say anything, though.  
The narrator hopes the other narrator will take up the slack of narrating settings, since they don't really know what a café would look like.