They would know they have 'more then just friends' feeling about each other by the time they fight in Soul Society?

Also In the post I was trying to think of a cool way for one Gigai to die and a stupid way for the other one to die. I've already thought up a good couple of adventures for him to have had while on Earth. Also I may need to give an actual age for Nero because I think that while Hueco Mundo has no day time the moon does rise and set like the sun.

Finally after a bit of research I've determined I was wrong about being unable to release ones zanpakuto without a release phrase unless one has achieved Bankai. The wiki says that occasionally a Soul Reaper can release their Zanpakuto without the release phrase and without having achieved Bankai.