Byakuya as a young child has always shown arrogance and quick temper towards many people, but his arrogance only led to a good part of his life which is you. You were a commoner compared to him, but something about you made him completely fall in love with you which led to him breaking the rules to falling in love with a commoner.

The first time you ever meet was when he wandered around the area that he nearly met his demise, but luckily you had reacted fast enough to save him from falling to such a high height. He was shocked to see how a commoner… A peasant was willingly to save him despite the harsh treatment people in the lower class receive; they would still have a way to show an act of kindness without payment in mind.

You pull the young Kuchiki noble up and he still looks at you in shock, but tries to remain calm like what his Grandfather had said to always remain calm no matter the situation in hand.