From a mathematical perspective, she's a three-quarters spirit. From a biological perspective, who knows, could be half, could be three-quarters, could be full. They're literally magical beings.
I like the idea that Ellen slowly regained the memories of her previous life. I don't really care for the stories where a character has all of those memories at birth (though it's fine for a certain grade-school granny) not do I care much for the suddenly gaining all of the memories at once later on (it almost feels like a possession story more than reincarnation).