Following his own moral code strictly, Castiel is one to value honesty and purity in actions above all else. Making decisions based on one's own selfish whims is his most detested behavior, and he goes out of his way to try and prevent himself from making overindulgent decisions, sometimes at his own expense when he shouldn't. He is rather softspoken and detests confrontation. This said, he will confront others when he feels the need to, and he is not above putting others in their place when they need to be put there.

Castiel does not tolerate selfish and generally unkind people, and in these cases he will advocate for others. He rarely advocates for himself though, preferring to stick up for others when they are being treated unfairly. When cruelty is directed at him, he merely accepts it.

Being very unsocialized from a young age, he rarely understands why people do the things they do, particularly immoral or harmful things. He often voices his concerns and can come off as judgemental because of this. In reality, he can often be understanding if treated with patience, as he isn't truly judgemental to others unless they deserve it.