A "devotee" is someone who has strong love, enthusiasm, or dedication towards a person, cause, activity, or belief. They are deeply committed and devoted to something or someone. Full definition
Now a congregation of devotees of Spirit, rather than the natural family, is the setting in which nurture for spiritual maturing takes place. (religion-online.org)
It's one for fans of the good captain Hanks and a must - see for devotees of Microsoft Flight Simulator. (nzherald.co.nz)
After several years of promoting the Clean Program, Junger has hundreds of devotees who chatter on the Clean forum and elsewhere about feeling marvelous, and indeed cleaner after the program — like this writer from Outside. (npr.org)