Keiji's a child at heart when you get down to it.  He deeply believes that love and bonds will win out and is what is needed for a better tomorrow.  He's a bit of a flirt and not in the sense of always hitting on women but he's always running about doing what he wants rather than what may be needed.  He's irresponsible, or so everyone says, but the man is geninuely concerned with what Japan will become if the war continues and travels in hopes of finding a way to end it all.