As someone who knows his way around a disadvantageous life, Clement managed to get the three of them going even without any adult looking after them.
Ranging from sustaining their basic needs such as food and water to guiding them to where Helios is staying at, he continued to help them out. He did expect that they would find this kind of life so frustratingly grueling that they would keep complaining. But much to his surprise, they were faring better than he imagined.
A sheltered prince and an inexperienced orphan - since Eric and Seraphine are those respectively, Clement thought that they would struggle like how much he did during the first time he went through the cruelty of the outside world, but he thought wrong.
Even when they can only sleep and spend their nights in any alley that they find - just like now, they never utter a single complaint.