The ones who are ride or die for their group. They will usually only stan one group, but they keep up with them for many years (even after disbandment).
A lot of these people are 1st/2nd gen and early 3rd gen fans now. They have so much love and loyalty to their group. It’s really admirable. They will also have lack of interest for other newer and more relevant groups, so they are rare but I’ve seen them around.
They also don’t care about drama or follow general K-pop much at all, aside from their bias group.
They are like shiny diamonds among rocks.