He manages a natural chuckle again. "I would not mind if you choose to stay here for the rest of the week after today. But I don't think you will dislike Nazoja." He lets his sight drift towards the sky. "In fact, I feel as if the charm of our current location is something that is encapsulated by the city, even though they are not the same." 
Becoming self-conscious, he chooses once again to preoccupy himself with actions. Somehow, the water in the kettle is already boiling. He crouches down near the fire again and reaches tentatively towards the side of the fire-base.

"Can you now?" A tinge of curiosity seeps from his words, though he reins it back in again. "Well, I do hope you will like the city. If nothing else, I'd expect the culinary options to be more diverse than what I can manage here." 
Lines of what appear to be symbols manifest vaguely against the edge of the fire-base. As if on cue, the fire begins to diminish as well, as if shrinking back into an unknown space. 
Once the symbols disappear, Sunny takes hold of the top of the kettle and spins it counterclockwise. 

Of course. Sunny's specialties include: Boiled water, frozen water, water, etc. Absolutely masterful as one can tell. Maybe even Masterful. 
"All done," he states, mostly to himself. To Caster, he asks, "Do you think it would be wiser to guard this place with magecraft, or to simply leave everything be?"

"I also am in favour of leaving the place be. Though I hadn't considered covering the tracks." Sunny pauses, doing some calculations in his head. Or at least he tries to, anyways. 
"Truth be told, I am more wary of scouts than thieves."
Presumably, he's talking about any prospective Masters who might be searching for enemy bases ahead of time. There's no rule prohibiting it, after all. But it would probably do him well to be more specific when he's talking about this sort of thing. 

"I don't believe there is anyone at the moment, but my magecraft is..." He shifts his eyes away from Caster's in what seems to be a natural reaction. "It is somewhat easy to track if someone is familiar with its indicators. So, I felt that timing may be an important priority."
He shakes his head slightly. "That is only my attempt to think ahead. I think that leaving the campsite as it is should be fine. But speaking of entering the city, would you prefer to continue your current state of manifestation?"

"You are correct on both fronts," he says, though only after yet another slight pause. 
The truth is that he thinks it would be cruel for someone so recently manifested to have to again dissipate their physical form like the morning dew.
"I have some attire that I brought for...er, in anticipation of this," he offers. "Though it may also be unconventional."
He's wracking his brain for what he even brought in the first place, but ironically, his mind is completely blanking, as if his memories are obscured by a dense fog. At least he doesn't betray the fact on his face. 

As his stance stiffens somewhat, the mage's face turns a slightly rosier pink than it already is, more alike to when he's standing in the midst of a frosty morning than the present moment. "I believe my present attire is normal, but I am not sure about typical. Has the Grail provided you with more information on the region's culture?" 

Sunny's mind is conjuring the image of a few cars racing each other on top of a row of skyscrapers at night. It's not exactly helpful as mental images go.
"I must say," he comments, "that I am failing to connect ideas related to clothing to those pieces of information."
What an understatement, really. 
"Meteorologically speaking, I think that the current season may justify any peculiarity as temporary outfits go," he adds. He shakes his head. "Well, just speaking about this topic likely is not very helpful. Allow me to show you what we have to work with." 
And with that, he walks back towards the tents again. 

Sunny's fast. He's walked into the first tent Caster entered, where he has already managed to set and open some of the bags, and is currently carefully rummaging through one of them. 
"I don't suppose you already know your clothing sizes?" he asks, rather hopefully actually. 

Sunny thinks he got that last part figured out already, but he can't be sure. Mostly because he just unearthed a full-on ball gown that he apparently folded in between some jackets, which he is staring at in disbelief. 
He's trying pretty hard to block Caster's view of the mishap, however it may have happened, but honestly discovering it is as easy as taking one step to the left. 

"Oh no, I'm just mortified," Sunny answers stoically. 

(How dare he not laugh and make Sunny feel even worse xDD)

"I appreciate it," the mage says, even though his face is progressively getting hotter. He stares at the dress. How in the world did it get there? It's certainly not his, nor did he buy it for Sollux, so what...?
Oh right, Sollux.
Caster can hear a "I'm sorry, Caster, I forgot to tell you something." spoken at a volume (and pitch) slightly higher than what is needed. 

Sunny turns his head around a bit later, seemingly missing Caster's movement.
"I forgot to inform you that I have a younger sister. Her name is Sollux." Well, that's the easy part. "She will not be involved in the ritual, but she knows of my participation and is living in the city at the moment. And...I think she would be very excited to meet you."  
By this point, he's turned around fully, though he did haphazardly stuff the dress he was holding back into the bag first. His face still feels warmer than he'd prefer, but he thinks he should look composed enough. Besides, it would be rude to not face the other currently. 
"I apologize if my forgetting gave the impression that I would be taking your permission for granted. That was the opposite of my intentions." 

There had indeed been no intention to deceive thus far, but a droplet--a temptation, a habit--wells up in the present moment, threatening to burst. Sunny tamps it down. 
"She does," he admits, and really, he hasn't ever said that before. But there's no disadvantage to the Heroic Spirit knowing that. Besides, if Caster turns out to be willing to meet Sollux, then there's a large possibility that the other would be able to tell from first glance in the first place. There is neither any benefit nor any sense to lying. 
Yet the truth still brings some pain--it feels as if he jabbed his chest with a needle, a continuation of the metaphorical becoming literal. He nods in the meanwhile. "And yes, I would appreciate you being willing to meet her...though I do think she would be the most enthusiastic out of the three of us. I mean that in the present and future sense."
So that's that.  
Surely the Grail knows that the affirmation he has just spoken has consequences. Surely this cannot be called a momentous decision. 
He hopes.

"Of course. I too have no intention of involving her in the actual affair." His tone of voice has grown a good deal tighter, perhaps associated with the way he quickly turns around, more than eager to conceal how thin the line of his mouth has become drawn. The actual quality of his voice remains light, however, as if everything he's mentioned has already been anticipated by him ahead of time.
"Thank you," he adds, appearing to again focus on the task of finding clothing.
The more he rummages in the box, the more he remembers, and in turn, the less hope he has. All of his clothing is surely too long or too wide to fit on Caster, but maybe, if by some stroke of luck...?