Harry Apparated twice in seconds, first to Ron's flat - the bastard had already scarpered - and then to Leila's room for the spell. He regretted not waking her and explaining, but unless they had good news, Harry hated to get her hopes up. Molly could explain things in the morning.
He met Hermione downstairs with Leila in his arms. Hermione had a connection to the Weasley flat open and Molly was waiting on the other side, nightcap askew and eyes wide. They hadn't given her all the details of Ron's disappearance, but she knew enough to be worried and expecting something like this.
"She's under a sleep charm that should keep her down for the night. It could be a few days," he said as he transferred the girl into Molly's arms. "If you need anything, ask for Faelan, he can help you get into the Loft. I have to go-"
"Harry-" Molly had shifted Leila to one arm and reached out to stop him just before he stepped back into the Floo. "Ron. Will he- is he-"
He pulled Molly into a quick, hard embrace, keeping clear of the sleeping girl. "It will be all right. You'll see." With that, he went through the Floo to meet Hermione. The chase was on.