Well what they bleed is not really blood but just an imitation of the real thing. Its not as thoug they have real bodies. It is just some sort of spirit substance, the wiki said what it was. Its like extoplasma or something. Either way, it simulates the real thing, but it is not. I mean, you can take stabs to the heart, be cut from shoulder to stomach and still live. Its pretty obvious that you do not have real organs, even though similar purposes. You have a place for food to go that you eat, and blood still pours out of you. It pretty much is more representation of what you have taken in damage to your soul more so than the body. At least I would think.

And according to I think Bleach Portal, the 13th Captain is supposed to be one of the most powerful and oldest shinigami because he was trained by Yamamoto directly. Though because of his illness he is not nearly as powerful as he can be. And he has a thing for sweets, which in Shinigami Cups he hands off to Hitsugaya at least once which is really cute.

Cloudy you are not marking out spoilers again. I don't know who Inoue is, unless its is Orihime, but it is definitely revealing to things that have not happened yet. Thankfully it is not that much, but it is more than I wanted to know.