Oh man, my most memorable OC was probably Klara, back in my middle school years. She was an alpha of a werewolf pack. She was stubborn and stuck in her ways. She didn't take a mate for the longest time until an unknown wolf came into her midst. He was charming and clever, content to let her run her pack as she always had. They had a child together named Cain and she eventually died defending him from an attack by hunters. 

She's come back in a few iterations throughout the years but never as long as her first run.