Byakuya was in an helicopter trying to save his comrades of the Future Foundation who were trapped in a Killing Game inside the Headquarters of the FF, but to no avail, and he started to get frustrated and desperate. He noticed Yasuhiro on the ground also trying to enter, accompanied by you and a few other people, most of them being FF workers. However, Byakuya had never seen you before, so he got intrigued, and seeing that your soulmate mark is the exact same as his intrigued him even more.