...He activates his sharingan but hesitantly allows it.

The sharingan startles her, but soon enough she's laid her tendrils along his forehead, found his chakra points, and - 

'Hi!' a voice chirps in his mind. 'Hi! Can you hear me?'

He nods, slowly.

She trills.

And, mentally: 'That's so neat! I haven't seen anyone like you before! I'm - ' and a series of electrical crackling notes - 'but if your vocal cords can't do that Spark works. Who're you?'

"Sasuke," he says out loud, and tries thinking, 'My name's Sasuke. I guess - Bird, if you can't say that.' He'll tentatively send a mental picture of a hawk.

'Bird! That's a funny name. You don't look like one!'

'I work with them,' Sasuke explains. 

'Oooooh', Spark responds. 'I got it! Where're you two from?'

He'll send a mental overview of what happened to drop them both here, and a vague concept of what his world's like.

'We don't have anything like that mirror thing here... Maybe you're from another galaxy!' she says, mental voice and posture excited. When prompted, she explains, 'The galaxy's really big! It has a lot of planets! It's kind of a circle that bulges up around a sphere in the middle, and the closer you get to the middle the more thing's're possible. I'm not big enough to fly off this planet yet, though, so I haven't explored. I heard the very very center of the galaxy connects to other galaxies!'

He nods. 'That sounds like how we might get home. Do you... Know anyone who can show us how to get there?'

She chirps. 'Dunno! Maybe Spray's big sister? Sprays the mergirl sitting on your friend. She's silly, to have left her chair behind so she can't just use that when she's tired, but her oldest sister's really big and has been exploring the area around here off the planet lately. She's not big enough to leave the sunlight yet, but she might know people.'

'That works.' A pause, and - 'Can we stay here, in the meantime?'

'Yes! Of course!' Spark chirps, then sings something out loud. Several of the other jelly-people flit into buildings, apparently talking to people, and a few call back. 'We don't get visitors from other galaxies! Or anywhere! This is really exciting!'

...Maybe he can get Hashirama to answer all questions.

'Okay,' is all Sasuke says.

'Yeah! I'm gonna detangle now, okay?' Spark sends, then unwinds her tendrils and zooms off when Sasuke agrees.

Spray chirps something as she does, clearly amused, and by now resting more of her weight on Hashirama's shoulders.

"They seem friendly! So what was that about?" Hashirama asks, easily shifting his weight to accommodate the taller girl.

Sasuke recounts the conversation.

(...He's vaguely uncomfortable with how Spray's draping herself over Hashirama, but also doesn't want to touch that thought with a hundred foot pole.)

Hashirama smiles a bit more gently. "Guess these last few days have been pretty lucky, huh."

Sasuke shrugs. "Maybe."

"A whole galaxy! That's pretty exciting... They don't seem paranoid at all, too, I bet things're pretty peaceful here!"

He's practically vibrating at the thought.

Something fond and fuzzy worms its way into Sasuke's chest, and he nods then looks away.

Hashirama just laughs, and when their hosts return lets himself be led into a meeting hall, where there's much communication about food preferences. (Seaweed cooked with spices is so much better than plain soup!)

They're bunked together - beds don't really seem to be a thing here, instead people sleep suspended in hammocks (which excites Hashirama enough he decides that sounds fun despite it being a bit uncomfortable) or on the floor in blanket nests.

When it comes time for bed - after a long day of trying to not socialize without annoying people enough to kick them out - Sasuke rolls his eyes and curls up in a blanket nest a few feet under and to the side of Hashirama's hammock.

"Night, Sasuke," Hashirama says, grinning, hands under his head.