Scale the wall like the badass dragon you are.
You use the grapple that you have made to climb the building, it surprisingly doesn't make much of a sound and you haul yourself up. Either the townsfolk didn't notice or don't care that you're on the rooftops.
Marcus: "Well now that you're up here, everything else is going to be easy... Hopefully.
Dragon: "I wonder if I'll be able to come back here; I have a friend I been meaning to talk to and there are still lots of places I haven't been to yet."
Marcus: "Yeah, maybe you will. But unfortunately Dr. A is going to be in a heap of trouble is we don't get to him fast!"
The thief launches himself off the rooftop and over the city walls, the hooded dragon tailing behind. Landing rather safely, they both find themselves outside the boundaries where many pine trees have immersed their roots into the forest floor. Beyond the leaves, the dragon was able to pick up a vague scent of death. The dragon disregards it as the smell quickly washed away.
Marcus: "Alright, it's important to know that we're about to enter the Cursed Forest. It's rumored to be the spawn of a terrible, mysterious Disease. Eroc Thgink is somehow terrified of clearing out the monsters here, so be wary of anything that seems hostile as it may inflict the sickness."
Dragon: "So we may have to fight enemies?"
Marcus: "I guarantee that, I'm a bit eager to see what you're capable of, and of course I can show off my own skills. Either way, I'm betting that you have enough supplies to keep healthy."
Dragon: "Weren't you meaning to get some before we met?"
Marcus: "stuff."