Soooo... the Hollow was made based on the soul of a Shinigami. Isshin can't use his Bankai when he is severely injured, because it is already Harsh to his body itself. Also, it seems that he can use blood to create flames or something like that, or at least gave his flames more power.
Masaki protects Isshin but can't hit the hollow with her Bow. She than let her bow disappear and the Hollow bites her in the neck/shoulder (much like Orihimes Brother did to Orihime.) Masaki holds the hollow and says "I goooooooo~t you!" shoots an arrow with a small bow directly into it's head, letting it explode. Chapter ends.
____________________________________________________ "KILL ME! LEAVE ME TO DIE IN A POOL OF MY OWN BLOOD!"" - Mitsunari Ishida, Sengoku Basara 3