Mine is Whitney. She was the first wolf villager I had. She never left in the next two years I had that town. Even when I restated my game just to get a new village layout she was the fifth villager to move in. I had to restart that town because of a glitch that caused fossils to never show up. I waited a week and couldn't find a single one. All I got were pitfalls and gyroids. I hope I get her again in New Leaf.
I've seen that Unicorn camp in my town. but I couldn't ask it to move in as I already had 10 villagers. Hell of a rock, paper, scissors game though