Both types of nerdz/otaku are fine, but mostly the first two because they are introverted.
so basically what you're asking is the "quiet girl" x "ojou-sama"
doesn't necessarily to be "otaku"
because most of otaku girl characters depicted as very sociable on the outside, but total otaku in the inside
And by Ojou-sama, i ideally mean an ojoudere : from a high-class family, well-mannered and ladylike, gentle and kind, with a very good education, good academic results, quite passive but sociable. In the manga you're citing, the fujoshi is fine, but the other girl is a popular school idol, which is technically not an oujou-sama.
what I cite (
Oshi no Bishoujo), the girl is not fujoshi,
fujoshi is more for girl who likes BL and stuff
and if we're going technicality, to me "ojou-sama" is just "young lady"
you know, when other people voluntarily put the girl in a higher pedestal
that's why to me "ojou-sama" character can be simply the proper lady type (yamato nadeshiko kind of thing), the queen type (or the jo'ou-sama) or the royal bratty type (the annoying ojou-sama, ringlets hair and all)
yes, one of those should be called "bishoujo" type or something else,
but usually it gets really complicated, so I just regard them within the same umbrella
if you look at
Watashi ga Koibito, Mai is the actual ojou-sama from high-class family, but I'd say Ajisai also checks out as an Ojou-sama character,
Kafka is treated like a nobility, but she is still from normal family
this one is also kind of "quiet girl x ojou-sama", though very very different