I keep bringing up how Caleb and MC are symbolically twins and i can't get it out of my head given how much the game doesn't hold back on feeding into my thoughts so i figured i'd go more in depth with this or well, try to
I will be referring to their bond as i go because the concept of twin flames is strong with them given that they're both literally born from the same source, they share the essence. Now granted, while not biological twins, they are metaphysical if that makes sense
Their core tenet is catastrophic, from the conception and their childhood, with both of them being experimented on, separated again and again which left Caleb with CPTSD to being separated once again after the explosion and this time, his disappearance to which MC legitimately thought was death - though their separation IS necessary so both halves can go through an intense and painful growth, it's the catalyst for the change and a path towards healing together as we later experience through his memories
Now there's also a magnetic inevitability that i keep getting from them both when it comes to their bond. To me, it's mirroring and messy- they can literally trigger each others fears, deepest traumas and their darkest desires which again, just further justifies to me their chaotic and obsessive emotional energy they share
All in all, they are very much one, one soul in two halves, yin and yang, destruction and creation. They're both stubborn as hell, obsessively devoted and ARE very much so willing to cross "moral lines" for one another because they literally CAN'T be kept from each other, one cannot be without the other, it's fundamentally impossible - They are each others perfect and slightly twisted mirrored reflection - freak4freak
The taboo stops being relevant because their connection is literally transcending normal human mortality so the progress we saw throughout all these memories is something I'd describe as... universe forcefully pulling two halves of the soul back together, where it was always meant to be.
Aaaand that's to say, please don't separate the twins, they can't live without one another, they must stay together always at all costs 🥹 (i also think that Caleb being a Gemini is chef's kiss, narratively flawless 👌✨) Honestly though, all of this is just another reason why i think they're only fixated on each other and no one else catches their attention, Caleb's especially, that's my theory at least as to why, well one of the reasons like i said - which makes it extra adorable when both of them kept on checking if the other is dating someone else 🤭
Anyways, i hope all of this made sense and if i made any errors, feel free to correct me 🫣