Nicely said! XD  I'd also like to add that it's official that Shadow does care about Rouge, but we don't know why, or to what extent.  While myself and others like to speculate in other places, all that should be mentioned here is the citable facts for both situations and letting the reader decide.  Also, this does not involve dropping biased little hints in the relay. (What the HELL is up with Rouge's bit on Knuckles's page?  But anywho, there needn't be a "relationship" section for anyone other that Amy.  If you must document something it should be dealings with other characters that heavily affect the one being discussed.  

Examples:
On Amy's page, her obsession and dealings with Sonic should be mentioned, as it's a focal point of her character.

On Sonic's page, Tails should be mentioned as the two are a speedy Dynamic duo.  Vice versa for Tails's page.

Also, like it or not, Shadow's dealings with Rouge do factor into his character.  Simply put, she brings out the best in him.

Silver's page should include his dealings with Blaze as he's been shown to be quite emotional concerning her.

Now these little odd things, like how Knuckles deals with Shadow or whatever, that's not important.  Nothing of significance happens.  Use your heads folks XD.