is rukia a lieutenant and if she is then from witch squad

yep she is....she is now a lieutenant of squad 13..under ukitake.........the proof for rukia being a lieutenent is the badge that she is wearing on her left hand.................heh ehe hehe now she is an officer

Yes. She is the Vice-Captain (Fuku-taicho) of Squad 13, who is lead by Jushiro Ukitake.