I think it might be a red herring. There is a lot of weirdness around how Makoto's Senpai has been mentioned in this quest. For example:
why is Senpai a secret when canon Makoto mentioned him all the time? Also Senpai is always refereed to as Senapi or the neutral "person" never any gendered terms. If they were just a boy like canon there would be no need for this careful avoidance.There are still two things that Makoto isn't completely willing to talk about, one because even years later, the death of her parents still hurts.
The other... Well that was something that Makoto wasn't sure how she would even approach. The big secret that she's kept for so long.
Senpai.
The girl pushes that thought to the side, instead glancing up to make sure that she is getting close to the stop near Usagi's house.
fits just as well as Senpai being gay. It would also explain why Senpai is a secret, since talking about her would mean outing herself, while Senpai rejecting her because he's gay wouldn't.The thoughtless dismissal because she wasn't [a boy]. Because Senpai was [a girl]
I think I might have mistyped something if you got that impression.[X][Police] 'Leave' and have Makoto and Rei around to see what happens
I basically like the idea of Ranma being Makoto's Senpai.