To answer that question, watch a Zatoichi, just one. MIght I suggest "Zatoichi On the Road," my personal favorite so far. It has many of my favorite Zatoichi elements in it: a great beginning, a damsel in distress that Zatoichi in no way attempts to get with, Zatoichi pitting punk Yakuza against each other in order to kill them all, and as always, that sweet, humble, gentle, soulful killer of men, Zatoichi himself.
Now, what other qualities would I want in said hypothetical girlfriend? Well, in the same vein, I do not want to have to learn how to sleep with one eye open. I'm too old to learn that one.
One more. How about, to start things off, I don't want to be the only one to show up. That sounds reasonable. Hear that sound? That's the sound of me putting my foot down on that one. In "Feeling Good" by Dr. David Burns, he mentions a young, shy man who insisted that he did not want to ask any women out until they gave him a clear signal of interest. Dr. Burns advised him to not worry about that and just go for it. I would advise any shy, young man on a similar course of action, if for no other reason than to get him out of his shell.
I've already done my fill of that sort of thing. The women I would just go ahead and ask out in recent years were typically much younger women in food service jobs of places that I went regularly. I feel that I have totally put my time in on that, and all that I really have to show for it is the satisfaction that I at least gave it a try. I am willing to try other means of meeting other women in other contexts before I ever go back to doing that sort thing with ANY young or youngish woman that I am currently acquainted with, or will become acquainted with in the foreseeable future, in this way; food service, retail, medical, anyplace else, NO EXCEPTIONS.
So the lyrics, probably the chorus, would go something like, "I don't want to be the only one to show up/ I don't want to sleep with one eye open/ and I don't want to watch my Zatoichis with no punk." End of message.