Bp's are notoriously shy at first. I have 3 and when they where introduced into my tank they hid for a couple of months. I put sinking cichlid pellets in for them when the lights went of at night.
Now they are first over to the glass begging for food, they even crowd to the corner of the glass when I sit on the chair nearest the tank.
They seem to recognise faces, they cone to the glass for my son,and myself but when they see my daughter they hide lol.