"There are some people who are so much a part of us, they’ll be with us no matter what … Always"
Their word. Their promise.
I really appreciate that Beckett said it to Castle once. It changes it from an unacknowledged “as you wish” analog to an overtly acknowledged connection between them. (And yes, I know that it was said in S3 and she was with Josh at the time whatnot, but I stand by the statement).
Yeah, and she said it again (or wrote it rather) in ‘In The Belly of the Beast’, which was a nice touch and showed how conscious she was of it’s significance (I actually think she did mutter it under her breath in ‘Still’ too, but I know that’s a controversial topic in the fandom…). Just like she started bringing him coffee in S5, it was a nice elevation and recognition of the symbolism of the relationship being equally important and powerful to both of them.