I like the sound of Shadowfan. Shadowphile is not bad either.
Don't Trekkies want to be called Trekkers nowadays?
Nowadays? By the early 70s, many fans were running away screaming from the term "Trekkies" and regarded it as an epithet (because it was used as one by non-fans), and they came up with "Trekkers" to replace it. A "trekkie" came to be seen as an overly-obsessed fan. But slightly tweaking the name didn't change much. It certainly didn't change the negative attitudes of non-fans.
My feeling for years has been that the genuine adults (and mature kids) who appreciate Trek don't want to be called anything. I don't. My definition of a "trekkie" is: Someone who would prefer to be called a Trekker. (Someone who wants a label.)
I wouldn't be against labels so much if all of them sounded as good as "Shadowphiles".