Ichigo
What do they expect of me?
What? He is just one person. Not an army. He may not be human, or hollow, or soul reaper, but he is still one person. He may be a freak, a combination of hollow, soul reaper, and human, but he can't do everything. But no one realizes this, but him. The only reason he is alive, he knows, is because he is desperate to protect the nakama he has made. And so he knows that he will die in battle alone, his friends waiting forever for him to return. And since he never will in that life, he is saddened that he will die letting down his friends.
And so he continues in desperation.