Running into something interesting with the book right now. My story has several shorter narratives woven into the larger one, and because these stories are meant to be able to practically stand on their own, they feature characters who don't appear in the primary story. The one I am working on right now centers on a rather complicated girl who, I discovered the other day, I do not like.
When I started her story, I had no idea this would be the case. I knew she would be a bit prickly, and that her choices would be poor ones, but it wasn't until I got into the guts a bit that I realized I'm not at all fond of her. This is the first time this has happened to me. I've written other characters who weren't, overall, the most likeable folk, but I always liked them just fine. I have a soft spot for difficult personalities. So it took me a bit by surprise, my disdain for this nineteen year old and her brazen nature, her selfishness.
I thought for a moment that I should change her, warm her up a bit. She is, after all, the protagonist of her brief little tale, and it would make sense that she'd need to be likeable. But it was too late. By the time I realized what was going on, the character was already fully grown, already sitting at a table looking at a man she doesn't love, who disgusts her in fact, agreeing to marry him. There was no stopping her. So I, her creator, am writing her not how I intended her to be, but instead, just how she is.