CIEN GRANZ

This is a very good question, honestly!!!

With my interpretation of Cien, he has a lot of confusion when it comes to his identity, but also his relationship with Szayelapporo and Roka. I headcanon that Roka manifested Cien from her idealized image of Szayelaporro, but Cien developed his own personality.

He views Szayelaporro as an obstacle in his way, seeing him reminds Cien that he is a shadow, or an illusory being. So he wants to wipe out any trace of Szayelaporro. He is the only person that Cien has actual malicious intent for.

He all but grabs them with his tendrils and lifts them up— yet careful not to crush...

STARTS SCREAMING AND SHOVELING GLUE INTO HIS MAW.

Going as far as to erase all those left who remember them. So as long as he is able to maintain the illusion, he is happy and content, but the second he sees Szayelaporro returned from hell, the illusory world he has built around himself is shattered.