I like to think post the jellicle ball in the musical that demeter becomes friends with mistoffelees. I think they'd get along with how they view the world and also I think demeter would get comfort out of being close with someone with magic who she trusts. This isn't to say she cant defend herself, of course she can, but having someone who she saw save someone from macavity so easily a la how he did with old deut would give her peace of mind from being so afraid all the time about the possibility of him coming back for her. I just think she deserves to feel safe and happy!!!! And they should queen out together