“A boy who climbed the Tower to follow Rachel — an Irregular who forced the door open even though the Tower never chose him.”
Handles shinsu — the Tower's magical energy — without any contract. Only an Irregular can do this; what other climbers spend years training for, Bam does by instinct.
He learns and reverses an enemy's technique after seeing or experiencing it once. Every powerful opponent in the Tower becomes raw material for his growth.
A boy raised in a cave with only Rachel as his world. He doesn't pursue strength as an end — he gets stronger for the sake of bonds. Even after betrayal, he reaches for understanding instead of hatred. That pattern makes him the most dangerous and simultaneously the warmest presence in the Tower. As his world grows darker, his core stays intact.