ok i’m gonna do it. here’s my thoughts on what the Sparrows are wearing and how they're standing in this particular photo:
1. Marcus.
font and center, he’s wearing the typical uniform we’ve seen on the Umbrellas in past seasons, except obviously with Sparrow colors. he’s standing confidently, looks relaxed, and has one button on his blazer buttoned. very leader-like: looks composed and calm but still has the blazer closed, like he’s doing the most to look put together and in charge. the framing makes him look way taller than everyone, definitely a "colossus."
2. Ben.
Ben is wearing the exact same uniform as Marcus, but he has his blazer unbuttoned. he’s adhering directly to the classic uniform style we know, but he’s a bit more casual with it, or maybe he wants to appear unbothered and more “chill” than Marcus. we see his indifference again in the release date teaser: while the other Sparrows (from what I can tell) are in fighting stances, Ben still stands with his arms in front of him and his eyes closed, seemingly not concerned at all with the fight that’s about to happen. he also has that ring on his pinkie, typically where people put family crest rings. seeing as his portrait is hanging on the wall, it's possible he was given the Hargreeves family ring, but since we don't know of anything like that existing in the Umbrella timeline, it could be something else. position-wise, he's standing near the front but not quite on the same plane as Marcus, like he knows his place as Number Two but still wants to be "in the front of the class" so to speak.
3. Fei.
we get the first modified version of the uniform: the blazer has been changed to seemingly more fit her style, and she has knee-high booths instead of the regular uniform shoe. also do you guys SEE that high collar white shirt behind her neck?? a statement. makes me look forward to seeing more of her looks throughout the season. she looks very put together and is even standing very poised. like even though her and Ben have almost the same hand positions, Ben is sort of slouching to the side while Fei is standing straight up. she's also standing very much to the back, not quite as far back as Jayme but further back than we might expect from Number Three. it could be a sign of her personality, maybe she's the type to get things done quietly rather than making a show.
4. Alphonso.
he's almost wearing the same uniform as Ben and Marcus, but instead of a blazer it looks like he has a zip-up jacket in the Sparrow colors, maybe in a letterman style. his tie and collar are loose, and he's standing like a dad who walks into the room while you're watching tv and stands there for thirty minutes watching with you. this goes along with his character description we got earlier: it seems like he's uninterested and would rather chill, but we also see he's not quite standing in the back, so we know he has some sense of investment.
5. Sloane.
she!! is not wearing any variation of the Sparrow uniform at all!! she's certainly not casual, like she still has a blazer-type jacket on and a white shirt underneath, but from what we can tell, she's not wearing the Sparrow crest. interestingly, she's standing on almost the same plane as Ben but just on the opposite side and in a shadow (compared to all the others, who have sunlight on them). i think the uniform plus her position definitely tells us that mentally she might be on her way out of the Academy, like she might already be trying to distance herself from Academy stuff. and her parallel position to Ben may be setting up some sort of Plot Thing with the two of them, either with them being opponents or eventually working on the same side.
6. Jayme.
she has another zip-up version of the blazer! it doesn't look like the same style Alphonso has, but it's definitely more casual than the normal uniform. this could even be the "hoodie" we hear about in Jayme's character description. she also doesn't have the button down in the typical uniform, it looks like her sweater vest has been modified to be a full sweater. she definitely still adheres to the uniform standard, but like Fei she's gone a bit further to customize the look and make it fit her style. the jacket and sweater plus the pants makes me think she's going for comfort while still wearing those academy shoes. she's standing all the way in the back, which also lines up with what we know about her not being one to say much; she might not want attention on her.
7. Christopher
interesting that he's in the middle plane rather than in the back, tells us he def has an important role in the family. also he is absolutely glowing in this photo !!
i know the Umbrellas will probably still be the main focus of season 3 (as they should be), but i really like trying to predict what the Sparrows will be like, even if some of them will have less plot importance than others. personally i'm most excited to see Ben and Sloane:)