That makes sense to me! If entities have personal qualities then they might have preferences for who they work with. People having different expierences with the same entities just due to that.
But if angels are a speicies though and not just a term for a group of people. This title is kind of misleading. He would still be an angel technically just one that might tend to cause trouble for people. Again that might depend on person to person? Or maybe its like how some people are allergic to shellfish. Or even how some are immune to poison ivy. Interesting to think about.
Though I can think of another possibility of maybe their being process of devoting an angel to a not angel. But that raises more questions of what that process does or even is. Would it be like getting fired from a job? I don't for sure about any of this just showing some ideas.