Juha bach has the ability to carve an initial into someones soul and give them part of his own soul/power. Once Quincies die their powers and the soul they took from JB comes back to JB and makes him stronger and allows him to live longer. Without this aide JB would not be able to see, hear, walk or anything because he grows weaker without conflict/death. He needs to touch people and empower people so that he can continue living. The Quincies knowing this live for JB....die for him. When a Quincy dies and his soul is sent back to Juha....Juha sleeps until the power is absorbed back into his body. Now that Ishida knows this and is aware of the regret in his heart..what will be his next move?