If Zanka handles Mankira with care, I like to think Jabber wields Lovely Assistaff with respect. Jabber knows that while she is precious to Zanka, she's not a fragile thing - she's a weapon, hardy and not to be underestimated like her owner. He swings her with caution at first, noting her limits and strengths while in her un-transformed state, then with a calculated, effective force. If he wants to reunite her with Zanka, Jabber's going to have to learn quick. Good thing they understand each other pretty well already.
On the other hand, outside of combat, I like to think Jabber is sort of awkward with Lovely Assistaff. She's bulky to carry around for someone not used to it. Jabber has no idea if he's allowed to rest her against the wall or not, so he has one hand occupied holding her at all times. He might have bumped into some walls with her going through doorways. What Zanka doesn't know won't hurt him!!!!