In the Lord of the Rings trilogy, Gandalf the Gray is the only one of the maiar who actually takes his Istari mission seriously. He roams around Middle Earth, gathering knowledge and guiding and protecting its peoples. In some ways, this makes him a little unpopular among the kingdoms of men, because he often shows up bringing tidings of war or great hardship ahead, and so they only see him when bad things are about to happen. Nevertheless, he brings this news for good reason, and always helps the kingdoms to prepare, which means that he has earned their trust over time.