Beast
Headmaster Leopold's speed couldn't be said to be anymore than two times faster than Ryu now. One had to know that Ryu's calculations of his equivalent speed now took into account the absolute upper limit of an agility type genius of said cultivation level. This meant that if Ryu confidently said his speed could match a Lower Divine Vessel Realm expert now, he meant the fastest!
Even Ryu himself didn't realize just how far he was going. He was comparing himself to Shrine Plane geniuses, but could Headmaster Leopold be considered to be of that ilk? He was so old yet he hadn't broken into the Immortal Ring Realm yet. On the Higher Mortal Plane, he was an absolute genius. But, on the Shrine Plane, calling him trash would be giving him a compliment.