How obscure, you ask? Meet Darth Vader's *other* half-brother, the one no one likes to talk about:
His name's Darth Stan, and he never really understood the whole "Dark Side" thing (and sadly, there wasn't a "Pastel Side" to choose from at the time). Then again, it's not totally his fault. After all, look at his mother, the sinister (and aptly-named) Darth Vera:
(And what makes her so sinister? The fact that she smokes of course! And smoking, as we all know, is Evil with a capital "E".) Come to think of it, it really is kind of sweet, the way he takes after his mom and all. If only they could get him to move out of Vera's basement (fondly known as "Stan's Personal Death Star, Jr."). Perhaps its time for an intervention....