Excellently creepy prompts! If anyone needs to use my characters for background material, here's what they'll be doing.
Craw is busy hustling and has never really thought there was a chance he'd be reaped, anyway, so he's not paying attention. Trying to figure out what anti-Capital demonstrations he can join or cook up, assuming he'll still be around.
Emily hears about the change of rules and immediately dumps her one-night stand just in case either of them get picked. She goes on a shopping (and stealing) spree for a good suit and tie.
Haylo probably spends the whole morning gossiping with his mother, the flamboyantly ruthless District leader, about the new developments and eating a fancy breakfast.
Craw is shocked at being called and stays uncharacteristically quiet as he goes up to the stage, fidgeting with his scarf. Once the reality kicks in, he's more just annoyed about all of his plans being interrupted.
Emily has no plans and acts pretty excited to get lavished by the Capitol and not even have to kill anyone. Her smile falters once as she thinks of a special ex husband who might be watching.
Haylo's sister-in-law is actually the one who gets reaped and he's like "Oh no no no, you are a married woman! I'll go~" since he was technically a Career meant to go to the Arena and get killed immediately and earn the family a bunch of rigged betting money anyway.
The entire teenage population of Craw's district comes to tearfully send him off, even if they don't know him personally. Everyone's at least a friend of a friend. He manages to keep the mask up and smile and make promises, but by the end, he's exhausted and overwhelmed.
Emily waits in vain for her family members to show up. The only one who does is Sam, the ex in question, the last person she thinks she wants to see. He barely makes it in time and gives her a few quiet words of encouragement. She doesn't kiss him one last time. She regrets it.
Haylo will be able to stay in touch with his mother, but she shows up to congratulate and instruct and hug him anyway. His sister doesn't say anything, but his step-sister, Mycelia, does thank him. For once, he doesn't brush it off. This might be his only earnest moment in this entire shindig. Savor it.
Craw has no idea what to make of the victors, actively avoids the Capital reps, and is happy to socialize with other tributes but doesn't make a romantic move yet. He seems friendly and outgoing.
Emily avoids crowds and most people, focusing more on the food and remaining a mystery as long as she can, though she will chat if addressed. She seems smug and intimidating.
Haylo just lounges around and chats with anyone who approaches him, complaining about the food and loudly speculating on how early they can start on the sex. He seems pompous and unapologetic.
Craw tries to work with the stylists and ends up with something nice. He's still pleasant to his district mates, but maybe a little reserved still. He's comfortable with all the attention.
Emily refuses to let the stylists alter her in any way and assumes she will naturally rock any outfit they produce. She does not. Still, she remains bombastic and will be touchy and jokey with her district mates. The parade might throw her off a little.
Haylo is already a stylist and is so in cahoots with the Capital ones. He is drop-dead gorgeous and is unfortunately aware of this fact and will mock anyone else who even tries--but will be oddly encouraging and give tips to anyone who seems nervous.
If any tributes are going to team up or try anything underhanded, Craw will get involved, from "fake dating" to "full breakout." He's increasingly uncomfortable with the violation of privacy, but he's determined not to let the Capitol have him that easy.
Emily doesn't care and is just having fun with it. Enjoying the food, getting up to mischief, pocketing the silverware. Flirting may or may not happen. You cannot contain her in a way that matters. She might at least hear people out on teamwork proposals, but it's iffy as to whether she would actually commit to anything.
Haylo throws himself into the role. This is the character he's been playing his whole life. He was born to be sacrificed and has never had the luxury of autonomy. All of this is just a natural extension of a destiny he's never tried to fight as long as it justifies keeping him alive. If any of the other tributes try to get a peak under the mask, they will not succeed. Not yet. Sex, he'll do. Teamwork or friendships, no.
Again, if there's any group coordination, Craw will do what they're doing--defying the Capitol, making up stories, whatever. He will do anything up on that stage but tell his own truth. It probably won't stand out all that much if there's no teamwork. He knows exactly how to blend into the crowd until the right moment.
Emily will somehow show up in her original suit and tie and a guitar and badly sing some country love song the whole time no matter what Caesar tries to say. The "love" song will turn out to be about a truck right at the end. She will cry.
Haylo, equipped in full slay ho fit, will probably try to seduce Caesar, who will resist playfully but get really flustered about it. Everything Haylo says just reinforces his image as an arrogant, careless prince.