Kazirra's Links
Kazirra sees Zandur as her bumbling younger brother and finding he's the Dragonborn has only changed that somewhat. While she knows he's more than capable now, she can't help but plead for him to return home, something she's glad he agreed to.
Zandur loves his sister to death and despite what you may think due to her size, bows easily to her. He regrets leaving his family alone for so long and easily agrees to return home on her request.