The Aesirs were catching up with Casper quickly as the latter also crossed the streets as fast as the wind.
Rat swiftly went through the buildings, which had a lot of obstacles, letting them flabbergasted with how he could deal with them so easily.
If it was a normal person, they would have already captured them. Casper himself experienced how harsh was to run long distances on top of buildings, and it was very exhaustive for him.
However, that Rat was peculiar. His way to move and his unusual speed was far beyond the technologies supporting him; it was intensive training and, more alone, he knew exactly the paths he took, where he should go, and what kind of things he would find.
'I can guess just one thing…' Canute reasoned, getting to the same conclusion as the other two. 'This person is more than some months on this Castle, only. We are talking about a year or more. It's someone naturally used to walk through the city!'