Forgetfulness said:
Can someone clearly explain again how Isshin is supposed to help Masaki?
I know he just has to live with her and stuff, but what's all this stuff about human/shinigami and quincy/hollow?
To stop the hollowification inside Masaki, Isshin has to link Masaki's soul and the hollow inside her with his own reiatsu (his powers of shinigami). the hollowifaction created a imbalance inside Masaki, then Isshin has to become a human/shinigami (by using the Kisuke's special gigaï created from a human soul), who is the opposite of Masaki (quincy/hollow) and to be linked with her (by using his reiatsu of shinigami) to recreate the balance inside Masaki.