Honestly if any Dungeon Meshi character deserved an expanded role in the series, it should have been Rin. She's the character to me who most feels like her story is incomplete and glossed over...probably the one instance where the manga actually frustrated me with its refusal to engage with her as a character in favor of Kabru.

I mean, the backstory Kui gives her in the extra content is, like all of them, really well thought out, but in the manga itself a lot of the time she kind of just exists as an accessory to Kabru? Like, she's the Girl who Likes Kabru to Establish that Girls Like Kabru...there's a couple moments in the manga where we see hints of a deeper character, but most of her story is relegated to the extra content...which sucks because I think her role in the story and especially her history with the elves is so incredibly important to understanding the wider world.

Because we mostly learn about the elves through the eyes of Kabru, and while Kabru didn't have a great experience with the elves for sure, he was doted on, a golden child. We do learn that Rin was treated terribly by the elves in the manga, but again, we learn it through Kabru's words and it's not really something that's focused on. I think Kabru has genuinely good intentions and cares a lot about humanity, but unconsciously he has a tendency to treat people like pawns in a similar way that the elves do; part of his character arc is learning to be actually genuine with people, but that only actually happens once he's separated from the rest of his party, with people he barely knows. It makes sense for him and the place he's at, but I can't imagine how frustrating that must have been for Rin, who doesn't really have anyone else. She's trapped in an unresolved character arc, left in this limbo space of chasing after someone who just doesn't have the same reliance on her that she has on him.

If I were writing the manga, I would have made her a character of equal importance to Kabru. Rin would balance out his role in the story...she's more pessimistic than him, for good reason, and despite or maybe because of the ease in which he traverses the social and political worlds, in many ways I think she understands the world better than him. I want to see the world from her perspective, to learn more about what her view of the dungeon is and why she's supporting Kabru in his quest to become the next dungeon lord, to see her grapple with her trauma, for her to have to learn to lead the party when Kabru isn't there, for her to come into her own as a character. I also feel like she just would fill out the main cast in a really satisfying way...she could easily be a narrative foil for so many characters, Kabru obviously, but also Marcille, Izutsumi (God, think about the potential interaction between Rin and Izutsumi), Thistle maybe, there's probably more if I spent more time thinking about it

Also kind of going on a tangent here but she's sooo ignored on the fandom side. Frankly I think that whatever Rin and Kabru have going on is just as interesting if not more so than the relationships between Kabru and Laios and between Kabru and Mithrun, but I don't think I've seen a single post or art piece on this website where she's present in his life at all (or even not present in an intentional way that would serve her character.) To be clear I'm not saying that I ship them or whatever (kind of hate that word tbh) or think they should end up in a romantic relationship (I really do not think they should end up in a romantic relationship). But like. Come on. They're so important to each other's characters and she can't just be written out of his story.