Hmm... Dino seems like the kind of person who is not really pushy, but just happens to know a lot about... whatever the topic of conversation is. He wouldn't dominate it, but he would have a lot to contribute.
cinder seems analytical, not very talkative in real-time, but not averse to listening to others talk at a party. She would probably be sitting in the corner sipping tea, tracking the interesting parts of the conversations on either side of her, while part of her brain is planning what she should make for the next party. You know how thick and fast the parties come in December.