^Hinata's speech is far from feminine (it takes some Japanese knowledge to tell, though), and the first time she made Noa blush was with a prince-like smile.
She even got called boy-like later in the manga.
Granted, in the end she's more of a cutiepie with a dash of tomboy, but I can't help feel that will grow relevant later in her life (not necesarily in the plot or anything, though).
Eh, to be fair the first few chapters are quite Nako x Bocchi, I'm pretty convinced Nako wouldn't oppose the idea even after the latest developments.
Either way, this is quite the sight.
^^I don't think these two are from different points in time, there would be age gap of around 20 years though assuming that Saki's friend has a child about five years after Saki died.