Forwarding slash in Wordpress URL
I just found out this plugin https://wordpress.org/plugins/custom-permalinks/ and used it to add caracters like slashes and points, to the urls of a website i am moving to WordPress, so far it's working.Hope it will help !
You may be interested in Settings -> Permalinks, but I think you want more than that.
Take a look at the feature list for the redirection plugin. This allows you to setup redirects to other pages or do pass through redirections. If this isn't what you are looking for then I think there are a couple other plugins that may accomplish what you want. Hope this helps!