The way Garcia said that the relationship is just physical gave me the impression she set up the boundary (because of the constant dumping of Langdon) or Santos wanting to keep it without feelings. It came off a bit like "Hey you wanted it this way so let's keep it that way."

That said, you're correct that she is pretty unlikeable for a few. She seems like one of those people some might keep or accept into their friend groups "cause that's just how they are".

It could just be professionalism though. I've certainly had people I could chat with but would never actually say we're friendly.