Name
I find Darcia's name to be very fascinating. A lot of this comes from one tiny little fact: all we know is his family name.

Not even Harmona refers to him by his given name; she, too, calls him "Darcia." There is never any indication that he even has another name. Yet "Darcia" is almost certainly his family name, as it was the name of his grandfather. And other people refer to his family as the "Darcia clan."

So, what then does Darcia mean? If it's the only name that we're given, it surely must be important.

It turns out that "Darcia" has both French and Irish origins, and in both of those cultures it means "dark." (Yes, I was forced to look it up as a girl's name; but that doesn't really matter, as it isn't Darcia's first name anyway. The etymology is still the same.) Now isn't that interesting? Darcia's very name means "dark"...?

I attempted to look up the origins of "Darcia" as a surname, but apparently it's completely nonexistent.

And of course I plugged it into Kabalarians:

Your first name of Darcia has given you a very friendly, likeable nature, and you could excel in artistic, dramatic, and musical expression. With this name, you desire the finer things in life, but you do not always have the resolve and vitality to put forth the effort necessary to fulfil your desires. Your emotional feelings are easily aroused and you will always be involved in other people's problems as a result of your overly sympathetic nature. You have many disappointments as a result of extending a helping hand to others in need, and then not receiving any acknowledgement or reciprocation for your generosity. After each experience, you have to guard against feelings of despondency and self-pity. You have lofty goals and high ideals, but must incorporate more practicality, system, and concentration in order to materialize them. In health, this name affects the nervous system and also the fluid functions, giving rise to kidney or bladder weaknesses.

Actually, that's reasonably accurate, especially the bits about desiring the finer things in life and "lofty goals and high ideals;" but I'm not too sure about "a very friendly, likeable nature."

As always, Kabalarians is interesting, if not entirely relevent.