big big big fan of platonically, horrendously codependant grace & stratt.
like it starts with sharing passwords and whatnot, but then they have the keys to each others' rooms. grace is glued to her side like they're conjoined twins. she brings him along to meetings to science translate like he's her emotional support dog. he brings her lunch because she always forgets. they both fall asleep working in one office or lab or another all the time.
eventually they straight-up form their own way of communication. grace can say something on the same level of incomprehensible as "carl and i made a baby" and stratt will respond with some obscure hand gesture, and both of them will completely understand. they hold entire conversations like that. one day ilyukhina pops her head in the door to ask grace a question, witnesses this, and wordlessly backs away. she'll ask dubois.
there's a betting pool going on on whether they're hooking up, but one day someone finds out that grace is aroace or something, and it becomes immediately and violently clear that something much more concerning is going on with them.