let me tell you about Bubble
She could have more trauma than anyone else.
She can also have a shot at being called the main character.
She's very kind, although she sometimes could get in trouble (mostly due to Pencil)
She's been shown to have gained quite a spine lately, and she got mad at both Four and the announcer before.
If she wanted to take down the show, given how much of an angel she is, she could likely get a big following because people probably like her.
I guarantee she's secretly really strong.
She has worked with people she didn't like before, and she'd do it again.
I'm pretty sure you can make a Bubble out of ink and it would be more durable than water ones.
And the idea of her being an invinceable villain, especially for a horror game, sounds hilarious.
The point I'm trying to make is she could become Bendy if she really wanted too.
