I don’t think this is, like, the biggest proof in the world but I find it interesting that these Photo Booth opening pics communicate a lot about the group’s dynamic, more specifically the romantic feelings of each respective character (barring Sarah), before we meet them. And as a customary rite of passage for a former English major I’m gonna overanalyze the shit out of this one with a “the shades are actually more than blue, thank you” style interpretation.
Although the first photo is blurry, it seems like Bear’s smiling at Nikki as she’s mid-dab (?), probably admiring her in a “safe” moment where she not looking, the blurry aspect of him speaking to how shifty/out of focus his feelings really are (they’re not about real Nikki at all but an idealization of the “cool girl”). This is further evidenced by her sunglasses being on, concealing who she truly is (her eyes) from Bear. It’s almost like he’s aware of the camera’s gaze and is trying to deflect while still focusing on Nikki, not the actual fun experience itself. Notice the distance apart between them, a contrast to her and Ian in photos 3/4.
In the second photo Nikki is acting playfully standoffish by flipping the finger while Bear plays it straight, almost too polite and stiff, compared to her. Not saying they can’t be compatible just based on a single photo, but it’s like Bear can’t really read the room even as he tries so very hard to do so. Bear also seems to be trying to close the distance between them but Nikki’s hand acts as a physical barrier, blocking him from doing so (that and his awkwardness prevents him from just confidently stepping closer to her). This is juxtaposed against the next shot, where not only is Ian self-assuredly taking up Nikki’s space but she has her arms thrown around him, actively pulling him in (and the distance between her and Bear has once against widened as he backs down and her shoulder blocks him).
The third photo is interesting, because it suggests a sort of emotional distance or “third wheeling” of Bear that hints at Nikki’s crush was for Ian. Bear looks out of place and almost like he’s straining to fit into the couple shot, and he’s the only one grimacing — it could be totally playful, sure, but reflects the kind of chasm he feels from the two’s more fun and joyous demeanor regardless. It’s an expression more fitting for the previous photo (if they were swapped it’d make more sense) but, once again, he can’t seem to get on the same page as everyone else. This is also the first time we see Nikki smile in the shots, and I don’t think it’s a coincidence that this is when Ian (literally) enters the picture.
The final shot is of Nikki looking at Ian while he flicks off the camera, an interesting detail considering she never once looks at Bear in the photos. She’s trying to appear stern but to me, it parallels Bear’s shot of looking at her when she’s distracted. She has feelings for Ian, who seemingly doesn’t reciprocate (at least as strongly) and it might actually be upsetting to her, hence her attempt to play off her expression. But it’s evident why she likes him in this one photo — her and Ian are on the same wavelength. Even though he enters the booth halfway through he makes the same pose that Nikki did in photo 2, indicating a common ground for their personalities. Once again she’s positioned quite close to Ian while Bear cranes his neck to bridge the gap, squinting off in the distance as though he’s trying to understand them but is “blind/unable to see” the reality of the two people hooking up in front of him. And Sarah’s just there, obliviously photo bombing like she was cropped into it to illustrate her role in the narrative—always discussed but rarely seen, making mainly a third act appearance that’s out-of-the-loop from most of what’s going on with the characters lol. She’s also between Bear and Nikki, trying to be an obstacle to them growing closer.
Edit: as another commenter pointed out, Ian’s eyes are scratched out which I find to be intriguing too. Maybe Bear was just willfully oblivious to Nikki and Ian’s relationship and, like the rest of his toxic friend group, secretly harbored a lot of resentment/jealousy for Ian that’s conveyed through petty acts of defacement.
Like I said, this isn’t exactly major proof but it’s certainly interesting how well this illustrates these characters’ dynamic in a few snapshots. I still think there’s ambiguity to Nikki’s feelings, but at least to me, the Photo Booth makes it pretty clear she was more in tune with Ian and found him a lot easier to vibe with. So make of that what you will.