David and Zanna are alike because, they both care for their kids. For example, once Zanna almost got pecked to death by ravens just to save her daughter Lexie. Another example is that David dove in front of a baseball coming 60mph at Alexa his daughter. David and Zanna are also alike because they both hate evil. For example, Zanna, a Sybil met another Sybil but, that Sybil was evil. Zanna used all of her powers just to destroy the evil Sybil. Another example is that David will do anything he can do just to destroy the other evil Sybil Gwillanna. Once he went to the North Pole to hunt down Gwillanna. David and Zanna, as you can see don’t have a lot in common.
David and Zanna also have some things that are different, such as, David never thinks ahead. Zanna, on the other hand, always thinks ahead. For example, once Zanna was going out to battle an evil Sybil but, she knew that the evil Sybil would know that she was coming. Another example is that David went down to the artic and when he got there he noticed that he forgot to bring food. David and Zanna have another thing that is different. That thing is that David is always so nice, when Zanna can sometimes be mean. For example, David never yells, not even at Lucy when she looked at his story before it was done. Another example is that Zanna got so freaked out when she figured out that someone was spying on her. One more way that David and Zanna are different is, David stands up for him when Zanna is really shy. For example, David does not get mad when people yell at him, like Lucy who got really mad and yelled at David. David did not yell or cry back, he just asked Lucy why she was yelling at him. Another example is that when people yell at Zanna shy just says “Oh, ok, ok.”
In conclusion, David and Zanna are more different than similar, but the real reason why they are the same is because they are in the same story.