Chat caught Ladybug before she hit the ground, but her Miraculous Ladybugs hadn't properly healed him they'd expected them to, and so he hit the ground in her stead, cradling her against his chest with a groan of pain. He wasn't as injured, sure, but he was definitely still bruised up from the fight.
What is going on? He wondered, holding his Lady protectively close. They've never failed before. Is it… Is it because we know about one another? Was that why we were supposed to maintain their secrecy?
Swallowing down his panic, Chat leaned down to press his ear against her chest, listening to her heartbeat steadily and sighed in relief when he felt the steady ebb and flow of her breath against his cheek.
"Don't scare me like that, my Lady," Chat Noir sighed against her suit shakily, relief making him feel weaker than the Akuma's blow could ever have.
"Chat Noir?" A vaguely familiar, albeit much younger voice inquired. Chat turned and curled around Ladybug defensively against any impending onslaught before he realized that it wasn't Glitch, but the human boy that Hawkmoth had taken control over. "What's wrong with Ladybug?"
"Fight just wore her out, kid, don't worry about it," He replied a little too gruffly, for once not feeling his usual kind, amiable self toward the Akuma victim. "I need to get both of us to safety to recuperate, are you able to get yourself home?" He asked, already scooping Ladybug up into his arms before turning his gaze toward the teen. He winced at the expression on the kid's face and backpedalled, shifting Ladybug's prone form in his arms to put a hand on the kid's shoulder. "Hey, it's not your fault," he soothed, urging gentleness into his tone and a slight smile onto his lips, "it's Hawkmoth's. Just… Make sure you try and remember that it's just a game next time, okay?"
"I… I will, Chat Noir!"
Nodding, Chat Noir used his staff to vault himself and Ladybug to the rooftops, and not a moment too soon. He hadn't even heard her earrings' warning, and yet, with a flash, she detransformed in his arms, whimpering softly as she curled a little closer from the cold.
Tikki flew up in alarm, her own fatigue forgotten in her concern, to land on Chat's shoulder.
"How long do you have?" She asked him, looking down at Marinette with large blue eyes.
"What happened Tikki? Why didn't the Ladybugs work? Why is she unconscious?" Chat exploded into questions, but the sharp beeping of his ring cut him off. Seven minutes. Tikki floated over to look, nodded to herself, and then floated back up to sit near his throat this time, positioning herself just behind his bell.
"We need to see Master Fu, he'll be able to help you both. I'll direct you, but you need to hurry!"
"...Lead the way."