Correction. I listed only characters from the established, official timeline. If Konami stated that Annette and Maria are not related, incidentally, I wasn't aware of it. Nor was I aware that young Henry was in any way useless since he kinda' sorta' led me through the Villa garden maze and sorta' youknow became playable wielding a nice, big boomstick too.
And I mean useless in the sense that none of them were in actuality NEEDED to advance the story in their respective games. The only exception to this is Sarah of course, but I had to add her since Konami saw fit to grant her no redeeming merits other than a big pair of blue eyes. I mean, how the heck was I supposed to feel bad for her, or for that matter even Leon, when the time for her ultimate sacrifice came?