"Next set of rooms it is then." Masato spun around and rolled his way out of the gallery. "Big question now then, is which room are we going into next? Since there isn't exactly a lack of rooms waiting to be explored." The only reason Masato even brought it up was because he didn't want to be the one to make the decision of which room to go in. It seemed like a big responsibility. One he didn't want to take up. The potential to cause someones death via picking the wrong door? No thanks, The idea didn't appeal to Masato in the slightest. He was just good at keeping calm and making jokes. Not exactly leadership material.
Yori seemed to have assumed the mantle of leader anyway. As far as Masato was concerned Yori seemed like a good choice for leader. He was smart, calm and most importantly respected. Out of the three of them, he was easily the best choice. Kozue seemed like too much of a follower and Masato well he was honest enough to admit he wasn't cut out for the job.