reading the end talks knowing how everyone feels about staying with each other feels like being beaten over the head with a hammer. the subtext that Siffrin is taking away from each conversation confirming his own expectations of the others' expectations, versus the subtext that each of them are desperately trying to convey back to him without coming across as weird and clingy because of their OWN perceptions of everyone's expectations.
Bonnie (regular): "Wait, that's such a long journey though!!! I'm not gonna go find you just so I can punch you if you're wrong!!! That's dumb!!! [...] Okay, then I'll believe you!!! Hopefully I won't have to walk forever to punch you!!!"
Bonnie (friendquest): "...I'll miss you, Frin. ... I know you'll leave soon, but, um... Y-You should come by Bambouche one day! So you can meet my sister!!! So I can say... "That's Frin! They helped me a bunch! They're really cool!!!" So come and see me sometime, yeah? Promise? [...] I'll be waiting for you, Frin!!!"
"i know you'll leave soon" "that's such a long journey" assuming that Siffrin would never want to stay close by, that wherever he goes would be arduous for them to reach. ...and, maybe in Siffrin's interpretation, not worth the annoyance and exertion it would take to reach them.
Isabeau (regular): "I can't wait to go back to my old job, you know? Make sure to say hi when you're near Jouvente, 'kay?"
Isabeau (friendquest): "...I hope...I hope you'll at least visit sometime, Sif. Our journey is over, but don't be a stranger, okay?"
Isabeau, short and restrained after his aborted confessions. maybe keeping it brief and simple to not overcomplicate the triumph of the moment, hoping he'll have the chance to express himself properly later (they're all having dinner together tonight, after all! they'll have time for feelings talks then! why wouldn't they?). not wanting to overwhelm or assume. how can he ask for anything more substantial than a visit before Siffrin knows how he feels, what he might want, what Siffrin might want?
Odile (regular): "But now I can finally get back to traveling. [...] It'll be weird to travel alone now, but I'll get used to it again. Or I could just go home to Ka Bue... Hm... [...] Ha...I'll miss you, Siffrin. You're a little strange, but you're a good kid. Maybe try letting down your walls every once in a while, huh? And come to Ka Bue anytime. Maybe we'll meet again during your travels."
Odile (friendquest): "It was fun. Traveling with everyone. I will miss it. [...] I... I suppose everyone will go back to their homes, now... Mirabelle will probably stay here, Isabeau will probably go back to Jouvente, and we'll ask someone to accompany Bonnie back to Bambouche... And what about you, Siffrin? Will you be going back home? [...] Oh... Why no-- ... No. Sorry, this isn't any of my business. But... No home at all... I never knew. I'm sorry. [...] ...I'll probably be going back to Ka Bue soon. Our paths will diverge soon... But if you ever come towards Ka Bue... Please come by, and say hello, won't you? ...Don't be a stranger, Siffrin."
Odile, reinforcing everyone's assumptions, backing away from the opening Siffrin gave her out of respect for their privacy, and sharing more of her own hand than Siffrin may even realize—resigning herself back to the quiet of her own company after the warmth and noise of being with everyone else. but even as a fellow traveler, both ~obviously intending~ to continue their journeys, there's no suggestion that their paths may intertwine deliberately, only inevitably diverge and briefly cross by happenstance or on a whim.
Mirabelle (regular): "...You can be so nice, Siffrin. [...] You know, um, um... Um!!! I know we haven't known each other for that long... B-But I hope you know I really treasure your company! I do! I really really do!!! And so... Thank you! Thank you for accompanying me on this journey! [...] ...I'm sure you're excited to go back to traveling on your own... But don't forget me, okay? Come see me at Dormont anytime! I'd love to hang out! Promise!!!"
Mirabelle (friendquest): "I have a lot ahead of me, still. But I never would have realized this without you, Siffrin! S-So, whenever you're done traveling, or you'd like to stay someplace for a little bit... Maybe think about coming to visit Dormont? Just to say hi? B-But you don't have to!!! It's just an idea!!! [...] I'm glad we're friends, Siffrin. ... D-Don't forget about me on your journey, okay!"
Mirabelle got so goddamn close to an actual, straightforward invitation for them to stay with her. "whenever you're done traveling or you'd like to stay someplace for a bit" could be a long-term thing of indefinite duration! but then she anxiously backtracks to "visit," "just say hi," "you don't have to! it was just an idea!" out of fear of coming on too strong, imposing too much. she's the one afraid of being forgotten, here, worrying that she'll fade as easily from their mind as anything else, unmissed. trying to balance emphasizing that his company is something that she genuinely wants, but leaving room for them to back out without feeling awkward if it's not something that they genuinely want.
in every case, Siffrin's plans "to keep/go back to traveling" are assumed, the distance is assumed, the separation is inevitable. it's all Siffrin can hear, couched in polite, socially mandated overtures to keep in touch. everyone will be gone and they will be alone again, outside of brief, occasional reunions (and always reunions that he would have to impose to initiate—how can they choose to visit Siffrin if they have no home to visit?—how can Siffrin know if they truly meant it when they asked, if they'll still mean it as time goes on?).
it's all the rest of the party can imagine, too—of course their mysterious rogue will quietly disappear back into the forests and crowds, impossible to find or contact after it's all over. they're left asking, begging, through the clenched teeth of social restraints, not to be left behind or forgotten, either. please visit, they say. don't you get it? don't you know how important to me you've become, how much i want to keep you in my life? they don't say.
and now all i can hear when i read back these lines is
i can't ask you to stay/come with me, but please, please don't let this be the last time i see you.