this makes me think, how will all of this turn out in the end? It's gonna take a friendly tone and make Frieren grown and understand human feelings and Himmel it's gonnna be like "the one that needs to know what I have learn" since he was the most friendly towards Frieren in the original team? or it will take a even more dramatic tone with Frieren sort of realizing Himmel's true feelings and (maybe) those feelings are reciprocal adding a bittersweet feeling of "realizing my true feelings but it's too late"? either way, I hope we get to see more of Frieren and co. shenanigans until the fated day of arriving at "heaven" and meeting Himmel once again comes.
I like how by using Flashbacks we are still learning about the old hero party and their interactions, it will make the (supposed) ending even more painful, because we already know that 2 out of the 4 old members died (unless Eisen finally dies off-camera) and either way the Himmel x Frieren reunion is likely gonna be short af.
Edit: In my opinion, I think Frieren does, indeed, have some kind of feelings for Himmel, in her own kuudere millenial loli elf grandma way, but she herself isn't aware of it, I mean, the fact that Himmel keeps being like a "turning point" for her and was the one that triggered her desire of finally understanding humans (As she regretted not "came to understand" him) it's a big hint and this journey has showed us that even if Frieren didn't notice Himmel's feelings, she indeed knew him well just as he knew her as well. The fact that she kept that ring even when she wasn't interested on it just because it reminded her about him shows us that maybe she isn't aware of how much she actually enjoyed her time with Himmel.
Now I doubt the story will take a sudden change of tone and make everything romantic, but in a subtle way maybe she will come to understand her own heart and the fact that she liked him as well.
Ofc this is just me lmao, I think the most obvious thing is that even if Frieren gets to understand Himmel's feelings she probably just feels a strong platonic connection with him and that's it, but when the story itsef gives me this shipping crumbs I can't stop myself of imagining angsty romantic scenarios of how this shit will end, but I know it's impossible lol.