She’ll be called Betty, and she will have a female voice, but still shout all of the time. And then Betty and the Doctor will get into these sticky situations, but because Betty wants to change her ways, she doesn’t kill people. When Betty and the Doctor are hiding in the cupboard from the monster, the Doctor whisper’s ‘shh’, and then Betty will reply with ‘OKAY DOCTOR I WILL BE QUIET FOR YOU’, and then the monster finds them.
Can I just point out that this is essentially Oswin? Called it.