These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Maji de Watashi ni Koi Shinasai!
Ensemble Darkhorse: Gen was surprisingly one of the most popular characters from the original game, which led to him becoming a member of the Kazama Family in the later versions.
For the actual girls, Benkei was an instant hit with the fanbase and very quickly received her own route.
Ho Yay: Yamato and Cap's close friendship coupled with Capt's lack of interest in girls leads to this and is Lampshaded relentlessly.
At the end of Monshiro's route, Miyako, Momoyo and Capt all declare their love for Yamato and acknowledge Monshiro as a rival. Capt clearly doesn't get what definition of "love" they're using.
Gakuto and Moro apparently give Miyako BL vibes. The fact that Gakuto finds Moro cute as a girl doesn't make it any better.
Touma intentionally invokes this with Yamato to make him uncomfortable.
Les Yay: It would be easier to list the characters who don't have this sort of relationship with at least one other character. To name just one, Momoyo flirts with girls far more frequently than she does with guys.
The Big Sister types in general tend to be pretty openly bisexual.
Nightmare Fuel: In the Visual Novel, at least one fight scene with Momoyo emphasizes the violence with FMV shots of breaking bones in X-ray views.
There's also Miyako's death glare in the visual novel... *shudders*