I'm sure in time all of your cats will learn to at least tolerate him. I've found that it takes females much longer than males though. Good luck.

The chirping thing sure does remind me of my RB Starr. He was in love with Ziggy when I brought her home and he's follow her every where and chirp at her too. She ended up being the only cat that would actually allow him to play with her because he did play rough.