Zara the Undying
In the middle of World War II, Zara the Undying became a zombie and was captured by an Allied soldier who said 'You're going to have to come with me, even if it kills you' as he put a leash on her.
But unfortunately for him, her health was only 10%.
Unpredictable, grumpy, and aloof, she originates from a war-torn Eastern European village with ancient superstitions and is an outcast who was ostracized by her community due to mysterious powers she possessed.
She dislikes loud noises and crowded places and survived a brutal ambush that wiped out most of her family.