Man, that was such a stereotypical scene common in romcoms with "school idol" type female leads and generic-looking male leads getting the stink eye from randos. Even Shin himself pointed out the gazes.
I do believe that "Ahem." by Schnee was the first time I've ever seen her express a sign of jealousy (excluding that private scene with Shin where she talked about Marino). She's not kidding when she said she hasn't given up. Lady is stepping up her game a little even in public. So Schnee uses Yuki as her pseudonym while disguised. I vaguely feel like I've seen that before, but not sure if it was in an earlier chapter, or from the anime.
I appreciate having Tiera around as a sort of "ground control" showing the closest thing to what normal looks like, when most of the cast are strong characters. Even Kaede is strong even when she hasn't actually attained full control of her powers yet. She's easily overwhelming Tiera who was trained by Schnee (although IIRC she held back on the training considering Tiera is pretty normal).