Whitsantos siblingism means so much to me.
(This is all coming from headcanons that were around for steve/robin platonic soulmates era of strangerthings (still there and will never leave) so there's a quite a bit I've taken from that and pushed onto this new sibling duo. )
they share their middle names, calling each other 'trinity issac' and 'dennis maria'
the wardrobe is for them both. They are consistently in each others clothes they don't know whose is whose anymore. Sooo many flannels. Also same exact jean and shoe size
Cuddles after long shifts, needing that physical comfort they give eachother.
Speaking to eachother through facial expressions alone.
Answering for eachother when someone asked either of them a question:
"Whitaker we need your results on the patient in North 3?"
And without even looking up, trinity is passing over paperwork "yeah the bloods on there, nothing to worry about, just writing up some charting and he'll be over"
To which dennis is sitting there nodding as he types.
Trinity never finishes a protein bar, she gets the needed amount to give her a kick and then quite literally throws the last big bite at dennis in the wrapper, he catches it everytime and stuffs it in his mouth in impressive timing.
Just like dennis never finishes a can of monster, he'll just place it in trinity's hand and she'll just down whatever is left and whoever is going in the direction of the bin takes it to throw.
Javadi only asks once "aren't you guys like sharing spit doing that all the time?"
And they both look at her, with matching little frowns and eyes narrowing "not really" is the answer given as they both look away at the same time and carry on with what they were doing
This confuses javadi even more.
The whole pitt knows when they are arguing, as they don't talk to eachother outside of simple comments with patients ect. BUT they are touchier than ever. Constantly have arms pressed against eachother, leaning on one another when listening to an attending, one time they share a seat while charting/paperwork. But there's no talking. It's like their bodies see the argument as something devastating and needs to compensate somehow. It can last a couple days sometimes but when it's over it's known EVEN more, they give eachother the body space needed but they don't stop talking, they become more enthusiastic over cases but also more bratty and bitchy to eachother and everyone around them. God forgive anyone they double down on together.
Guard dogs for eachother, but beat eachother up/rough house. Someone new once, thought it was banter between everyone in the pitt and pushed trinity a bit too hard after a joke and dennis was already up and in their space bodily moving them away from trin while glaring. Yet trin and dennis will push eachother into walls and trip eachother up and slap eachother a lot and a lot harsher.
They are eachothers emergency contact
Have had many conversations about merging into one body or brain and how amazing that'd be
Trinity let's dennis puts flowers in her hair that he picks while they go on walks, he also has them in his. But she'll never let anyone else ever do that, they both press them when they get home and put in a scrapbook they share.
Knows eachothers type to a T and if they get anyone come in that fits it, they'll give eachother a look. No one has picked this up thou, and the pitt gets confused as to why they wide eye eachother around certain patients/staff.
Pls ignore any grammar or spelling issues lol