klaus would’ve rather died than let anyone else in, but somehow, you were able to weasel your way into his heart — you became his weakness.

and it became quite clear that you became a weakness to klaus, which is why his unsired hybrids kidnapped and tortured you, to get to him.

but, you didn’t know that he cared about you, like that, so it was quite shocking, when he came bursting through, ripping out hearts and cutting off their heads, just to get to you.