That night he lies in bed thinking about the scar on her neck, and wonders what happened. He thinks about checking up on her; earlier Alya had made a big deal out of what she said was the true, delicate state Marinette was in, hinting that there was a lot more to that scar he had seen curving around her neck than the other girl was letting on{would let on}.
Alya had become a curiosity to him; her and Nino both actually.
He had mostly only seen her as the famous creator behind the LadyBlog.
He had seen her as Nino's friend, maybe, and Marinette's best friend.
But now she was his friend, sort of.
And, despite the death of Ladybug, the hero who'd brought them together, Nino and Alya were still as chummy as before; closer, actually.
He could never understand why.
And they were both really protective of Marinette (she hated it).
He had once tried to ask Nino why, but the other boy brushed him off:
"Can't tell till she does."
What was that supposed to mean?