Bacon is in a good mood by default if that wasn’t obvious. When he’s not, he doesn’t talk much and acts all mopey. He’s either having the time of his life or incredibly depressed, there is no in between.
Sin will have a very warm and soft smile and their eyelids will droop every so slightly. They’ll also make more really bad puns and dad jokes along with start using more words like “Gosh darn” or “oh shush”
In public, KitKat will simply be less agitated have the faintest of grins. Along with not acting as cold or indifferent. When only around people close to her. She’s much more pleasant than normal and will even fully smile on occasion. She’ll even put up with her friends antic a bit more.
As for me, I’ll have a faint smile and my tone of voice will also be a bit brighter.