Okay, this might be just me.
Of course, there is your obvious bias in a group.
But a secret bias is that member you know you love, but want to lie to yourself and say you don't.
I'm gonna use BTS and GOT7 for this example.
BTS Bias: J-Hope
Secret BTS Bias: Suga
GOT7 Bias: Mark
GOT7 Secret Bias: Jackson
Who is your secret bias?