Yes that usage is fine. in that context is being used as a , which you can safely use to refer to something that belongs to yourself. like this is not even an honorific () in the first place.
* Terminology: Does the term include all etc. prefixes, or only ones outside of a context?
Actually, is a word that lies in a gray area between and . In very formal situations, like in job interviews, a few strict people may say should be used only as a . That said, no one would consider this a problem in a casual interview with an idol.