To point 1: In D&D, Devils are Lawful and make pacts with mortals, (as in "deal with the devil") and Demons are Chaotic murderhobos. In M:tG, Demons are Black-aligned and make pacts with mortals, (as in demonic bargain) and Devils are Red-aligned murderhobos.
To point 2: Chandra and Nissa are on Strixhaven?! But in all seriousness, do we have confirmation that the Twins are bi, or did you mean someone else?
To point 3: Maybe, but unless everyone is lying he doesn't have a card, and with the current story paradigm of five articles on topic, 5 of side stories, they haven't even had time to really tell the story of the main sets so far, let alone go on tangents with other planeswalkers, so I doubt it.
To point 4: I didn't catch that. I did, as someone with ADD, really connect with the line about her fiddling with her bracelets in order to stop herself from messing with her claws, and Dean Nassari was great. I will say, I did have some issues with the story though: First, from what we have there, the teaching/grading structure at Strixhaven doesn't really make any sense (and they NEED to put some sort of security around their very-delicate art installations donated by alums). Second, while it worked for this story in its way, early in spoilers people pointed out how problematic it is to have most of the students be legacies, especially because it turns the "legacy student trying to escape their parent's shadow while feeling like they might only be there because their parent donated" conflict from an interesting struggle for one character for whom it works into "that thing that all of the spotlighted students have except for the Twins, and THEY are the wealthy children of a foreign political leader who got into school on a sports scholarship, so they fit into an entirely different problematic school trope.
Separate from all of that, looking at card flavor, are there ANY Silverquill students who don't look like awful people? I know it's a combat game, but still. You can like puns and not be objectively terrible.
EDIT: Also, we were joking about tea studies, but I'm like 90% sure that that is Dina's major.