nicely done man hats off
ヾ(☆▽☆)
makes complete sense! now, I'm sitting here wondering who else is close to Soma aside from Ciel and Lizzie that makes him react to the visit like that? hmmm...
I don't think there's anyone else. Soma says "you're acting weird" which means it's someone he knows fairly well (and this same chapter reveals he's more perceptive than most of us thought). We haven't seen him spend much time with any other character in the manga other than "Ciel" (not to mention he lives in the city, away from the rest of the cast other than Ciel and Sebastian in the current arc), so the only person it could be is "Ciel"/the twin.
I doubt the gun was Lizzie. Story telling 101: events that are occurring simultaneously with another POV is done for dramatic effect and both events are relevant to each other. In other words, whatever/whoever Agni saw in the picture is the one who shoots Soma (hopefully he misses). And Agni wouldn't be shocked to see Lizzie in a picture with Ciel. It has to be a twin because we already saw "Ciel", real or fake, in the picture and Agni wouldn't be so shocked if there was a different boy/person in the picture with Ciel. The only reason to be shocked is if there was something in the picture that would make it obvious Soma was in danger. The only answer is a twin.
Another thing is Lizzie: she left by her own free will and had a good reason for leaving. She wouldn't betray Ciel. From that, I draw the conclusion that she left for Ciel. But why? I think she either 1) thinks Ciel is a fake (because she met the twin), or 2) is scared of Ciel. I don't think it's the latter because Lizzie isn't weak enough to leave Ciel just because she's a little scared.
Anyway, I hope the next chapter has the reveal (๑•ㅂ•)و✧