One of the things co-workers will want to know, but will likely not ask, is what you are willing to risk on their behalf. This is not to intentionally put you at risk, but to find out where your priorities lie.
This is a legitimate question, realizing they may have experienced leaders who are out to pad their own resumes to the point they will sacrifice relationships and trust to accomplish what they want. This is always done at the expense of others. So when the going gets tough, and you are needed to put your own job and character on the line, what will you do?
It is hard to know, unless you are committed to the organization and your co-workers to the extent that you will do what is right, and that is the end of the matter. If you operate daily with that in mind, your co-workers will know without your having to prove it.