no offense but parasocial relationship apply more for boy groups and certain boy group fandom ( you can guess)
if anything the pinks never feed fans to develop that lol most blinks are genuinely here because we like the girls but mostly for their music and their concept fit our taste.
Obviously, as fans we want to support them but we don't really expect or demand that they communicate with us we know they'll do it when they feel like it
edit: I will admit that I didn't read your op but the parasocial it's funny when bp and blinks are not the best example of that