Who is Silva?

Still trying my best to grasp the lore, I only started playing about a year ago.

Here's what I know about Silva: She was thrown into the abyss by Yharim. You can craft her armor somewhere around post-DoG. (iirc) The loading screen always says "Disposing of Silva's remains..."

Aaaaand that's about it. Cosmaticmango totally didn't make me start thinking about this again with their art, no sir, not at all