Minor SPOILER ALERT!
By the look of things that’s Blaise Zabini in the fiendfyre scene, climbing just below Draco. In the novel, Draco is accompanied by Crabbe and Goyle, but in the film I suspect Crabbe has been replaced by Zabini. (The actor who played Crabbe, like the actor who played Colin Creevey, is no longer in the Harry Potter films.) This makes me wonder if the death of Colin Creevey will be the death of that cute little kid Nigel instead. If so, I think it will be even sadder. Nigel’s a sweet kid, isn’t he? I hope they don’t kill him off. That’s all just speculation on my part, of course.
I haven’t noticed Zabini in this scene.
I hope you’re right and they don’t kill Nigel, it would be really sad 😦
They killed Colin, but if you weren’t sharp, you missed it. When Cho and Sybll are covering up a body in the aftermath, the seer quietly says “Poor Colin”