It all happened in a blur for Arthur. Elisabeth running over, pulling him into a hug and cutting his bindings which had become like a second skin for him away. He wanted to say something in response, anything in response, but he was overwhelmed with the sudden urge to cry of all things that the need to speak was no longer important. Because crying, for Arthur was not a common thing.
Even when she held his hand, and spoke in a language he had never been exposed to the likes of ever before, and even when they were being shadow-ported back home he didn't say anything. When they were back, he clung to Elisabeth as tightly as he possibly could, which wasn't all that tightly but it felt like it to him. The first sound Arthur made was a mix between a hiccup and a whimper, having forgotten that he was still crying in the first place.