Hana will be feeling betrayed and would want to kill Nero or at least she would never want to see him again and hold a grudge against him for telling lies and once they invade the Seireitei she would go after him eather way to kill him or to find out why he would help. She will during the fight for Rukia change and help Ichigo but she will ignore Nero totally for as long it is needed [ let's say that they both do know by that time they have more than just friendship feelings for each other]. She would probably even not wanting to team up with Nero or be in one room with him alone or something.  I can play the one Nero has to fight if that is needed.