Hey Miraishin, checking out some of your recent additions, I wanted to point out some better ways to handle linking people.
First, instead of linking to a person's page by using the full page URL, like [http://helloproject.wikia.com/wiki/Natsu%20Mayumi Natsu Mayumi]</nowiki''', just surround their name in double brackets like '''<nowiki>[[Natsu Mayumi]].
Second, if they've got their own site, no need to link to it on every page they're mentioned on, like [http://high-energy.jp/ Yoko Yamashiro]. Instead, just use a regular [[Yoko Yamashiro]] link and their site can be linked to from their page on the wiki. Though since we use Lastname Firstname format for Japanese names here, looks like she'd be on Yamashiro Yoko.