Demeter

Demeter is a very serious and tense gold and black cat, not at all like her sister and best friend Bombalurina.
This could depend on her history with Macavity.
Demeter was abducted by Macavity as a young kitten. And it is also said that she and Macavity had a relationship, but then she decided to leave him, this could depend on that she didn't like what he was doing and or didn't wanted to get involved. But this is just a rumour.
Demeter is very nervous during the ball, and she senses Macavity a couple of times.
Demeter is alway quick and the first to warn whenever Macavity is around. She has some kind of sixth sense that makes her able to feel when Macavity is near.
And it is also Demeter who exposes Macavity's disguise as Old Deuteronomy when he comes back after the catnapping.
During Rum Tum Tugger's song she doesn't join the other cats dancing around having fun, she just sits in a corner, by the owen, staring of into the distance, probably sensing that Macavity is on the move.
Demeter has a relationship with Munkustrap, who bravely defend his love, Deuteronomy and the rest of the tribe.
And when Grizabella appears she seems to feel sorrow for her. She walks up to her the first time she appears, but turns away with pain in her heart. She dissapears after her when Bustopher Jones appears, and doesn't join the rest of the tribe greeting him.
The second time Grizabella appears she starts to approach again but is this time stopped by Bombalurina.
Demeter does enjoy the ball and lighten up at times.
She is a very defined and confident cat.