I don't have any particular suggestions, but it could be a good idea to feature male and female VAs by turns.
An awesome thing would be if you got a little server space from Gotwoot so that you could put up lets say three short samples from various different roles performed by the dude/damsel currently under inspection in your article. I'm sure you have a nice archive of anime you could use to rip a few seconds of memorable lines (or you could ask for them from people you know here). You could use the same server space perhaps all the time, if that's an issue, and so only the samples for the new article would be available. But generally speaking tiny wavs (or mp3s) of few seconds each would take insignificant amount of space (and bandwidth as I don't think tens of thousands of people would be clicking those links anyway).
I don't know if there could be any technical difficulties with such a thing, but with the gurus behind this site, I don't think that should be a problem.
Edit: Like now you had a row of those little pics of the role characters Shuuichi has had. Wouldn't it be 1337 if by clicking each image you would get a characteristic line from that particular character?