From personal experience I found out that zero offense heroes are lovers & not fighters -> they surrender to whichever attacking force happens to show up.  I had my queen sitting in my home city and she was overrun and captured by a neighbor.  There were some knights on the other side of the city and they came rushing back to her aid.  They slew the oppressors and freed the queen, but she had vanished.

(Clicking on her card on the side of screen bounced the viewing screen to some random part of the world.)

There were rumors that witches had kidnapped her, and the knights continued to search for her high and low, but the kingdom was at war with three other nations and the knights had other duties.  

(She never had another turn, but was still alive.  She never bore any more children. I forgot to check if she even aged. The place on the map was at least 50 turns away as the crow flies. I can submit post-teleportation saves, if required.)