A "faithful member" refers to someone who is committed and dedicated to a particular group, organization, or community. They are loyal and trustworthy in supporting and participating with the group's activities and beliefs. Full definition
Others believe that there can also be responsible use between committed and faithful members of the same sex. (religion-online.org)
A few friends of mine, who used to be faithful members of our community, invited me to meet over beer. (nakedpastor.com)
«Like I said, certainly it's going to be an agenda for the consideration of NEC, whatever NEC decides, that will be binding on all of us as faithful members of the party.» (newsdiaryonline.com)