Awwww, Isaiah! ♥ I think his quieter personality will probably get Rafael to cool down a little when they're hanging out, because there's nothing to be competitive about. He's probably asked him to come play piano for the dancers before, and will talk to him about classical composers and all that nerdy music stuff.
Rafael is usually the person that ends up teaching new LARPers how to build characters and learn the rules. He definitely makes deadly characters, but I think his goal with the new kids is to make sure they go in competent and well equipped. SO THERE'S THAT. I imagine he's still very kind to Gabi.
Like with Katya, Rafael knows the Azurcrest prefects have been dealt a tough hand, and as long as Ree is trying, he's appreciative. He might tease her about going easy on all those rule breakers and WHAT ARE YOU DOING AT THIS WILD AND VERY AGAINST THE RULES PARTY YOUNG LADY. Also, he's very appreciative of her honesty and straightforwardness.