Kumiko
It seemed that Oura had one extra day to continue his training. Today was a rest day; many other students had gone back to their original school. It was quiet and empty in the dorms, and on the island in general. Without anything to do, Oura wandered to the hall where Kumiko took place.
He sat down crosslegged, returning the Horseman's half-bow, then turned to the neat stacks of incense that awaited him. Kumiko was a calming time of day for Ouranos; lifting the first scent, the boil closed his eyes and inhaled deeply.
The incenses this time were tricky. Ouranos rubbed his neck absently, less and less sure of what he'd smelled... finally, he made a guess.

Ouranos stacks his blocks in the pattern of Kashiwagi (Oak Tree)!