May contain spoilers ⚠ ⚠ ⚠ ⚠
Lol, actually this is true Dean usually gets into something like, oh purgatory... And who is there with him, yup Cas.. His brother from another supernatural entiy lol.
Cas and Dean have a beautiful friendship. They get mad at each other (most of the time Cas does not understand those feelings) they stand by each other (yup, Cas will put up a ward on the door to keep angels out to protect Dean and Sam)
Cas will /has killed other Angels to protect Dean and of course Sam. He will go through hell and back for those two Winchesters, just like Bobby.
L A Von Winchester