Aw, this is a fun one! They've all rubbed off on each other for sure but, as you'd expect, Tess has picked up the most haha!
Tess is always a "sit back and observe" sort, but has picked up Raf's chill, quiet manner of drifting into the background when it suits her. And, like him, her hands are always doing...something. Folding a piece of paper, untangling a random thread hanging from her sweater, tracing the rim of her glass or cup, tapping a finger to a beat in her head. She doesn't chew her nails or pick at the skin around her fingernails as Margie does, though. But she will bounce her leg or wiggle them side to side while she sits, like Margie does. She'll also occasionally make little popping noises with her mouth or click her tongue and random times, just because it feels or sounds fun--again, like Margie does.
Related to keeping her hands busy, and also borrowed from Raf, she has picked up the habit of straightening things out, or ordering them neatly/properly if she notices something that has been placed askew. Like, she'll smooth the tassels of a rug, or line up a row of condiments neatly on a shelf if it's clear that was the intention of their initial placement.
She doesn't usually emote with facial expressions, but one that she's enjoyed too much to not try on for herself is the raised-brow, half-lidded assessing stare down her nose that Raf does; an expression of curiosity from a person usually taller than the points of interest they are assessing--not intentionally snooty or condescending (as you might assume from the phrase 'looking down their nose at you").
She's still learning the limits wrt which little curiosities or desires are acceptable to indulge on a whim and which are not. For example, licking the tops of ketchup bottles is unacceptable is any context, whereas emptying 5 packets of sugar into a hot beverage is perfectly acceptable. Touching a random person's hair is unacceptable, but touching a random animal's fur or a plant's flower's foliage is generally okay. And for guidance on this, she turns to Margie (because if she were to follow Raf's example, well...he seems to be much more narrow in his range of personal allowances).
As Tess was more or less a blank slate wrt personality and mannerisms when they first met her, Raf and Margie haven't really picked up much from Tess. Except--they're maybe a little more careful and clear when expressing things like...turn of phrases or hyperbole lmao
Between Raf and Margie, there's a lot of subtle ways they've kinda changed to coexist more comfortably together. Margie's a lot better than she use to be when it comes to closing doors, turning off lights, and picking up after herself--to the point that a lot of these things have become an automatic habit largely thanks to Raf's patient consistency with her.
She's also become more mindful about how her jokes, gestures, jabs, etc are received--and had grown more conscientious against behaving in overfamiliar ways with people until she's gotten to know them well enough to know what they're comfortable with. She's not physical with people on first introductions anymore, and avoids like...sexual innuendo, etc, unless there's a super clear, obvious pretext that greenlights it. All this arose from a sense of not...wanting to embarrass Raf in public or at social gatherings. She's a lot more prone now to be quiet/reserved during introductions, and 'read the room' before she starts spewing memes and niche jokes that...maybe no one there would get. Just little...socializing things that should be obvious to most people her age, but that she was never properly taught while growing up in a small town with a relatively insular family.
Raf's gotten into the habit of singing little one-line serenades about Margie (often a shade of complete nonsense) or muttering sweet/silly little loving sentiments while he's doing mundane tasks. Ideally only when Margie is around...but just as often when he's by himself...or, on embarrassing occasion, when someone who isn't Margie is the only other person around to receive his habitually mumbled sweet nothings lmao. It all started because he'd do it in response to Margie's one-line serenades about him, and her random little "fwiff fwaff faff, I love my Raf" space-filling little stim mutterings. There's a lot of random, aimless call-and-response between them when they're home together whilst independently busy with their own little tasks.
He's also gotten into the habit of spending more time noticing/collecting things that just kinda--make him smile. Especially if it's something that he can take and show to Margie. Because if he thinks it's neat, then she'll think it's awesome. Her desire to share positive experiences and things with him has rubbed off on him in such a way that now, if there's ever a nice thing he sees or experiences, it seems almost a waste not to also share it with her. It's like...a positive joy modifier.
Man, there are a billion other little things, and probably much bigger things that I am simply failing to recall right now haha! But I have already spent too much time writing this when I should be...finishing my work on Woven lmaaoo <3