Ah... Chibi-Usa... not so chibi anymore, ne? She is quite a lady.
Imagine yourself lost, lonely, and in another century. I'm thinking you might just be a slight bit devious to get what you want and go home. This is just what Chibi-Usa did. Sure, anti chibis say she is Satan's spawn because she pulled a gun on Usagi. But the key behind this is that she just wanted to save her mother. She may be whiny at times but still... if someone close to you was far, far, away wouldn't you have other things on your mind than pleasing others? Chibi-Usa does! Please people, give her a break, she is only a child when she is annoying... she grows up and cares for others. Like most children do :).
Chibi-Usa, The Temptress Okay, we all know Chibi-Usa hits on Mamoru-san. I would now like to explain this. Chibi-Usa, The Warrior
Chibi-Usa, The Soul
Okay folks, to sum it up Chibi-Usa is NOT Satan's spawn in the flesh (DiC is... MWAHAHAHHA HAHAH HAHA HA HA.... HA...ha... *erhm* ^^;;) She has a good soul. She is the second warrior for the moon kingdom since and the Silver Millennium and is heir the the throne. She loves and hates like us all. Sure in the anime she likes to throw sugar hearts at enemies (I can see a Cereal-Daimon laughing at her...) and she likes to toss around a crystal bell but she is also a daughter, a lover, and a warrior. Give her a break. ^^.
No, Takeuchi-sama does not support incest, but she uses Chibi-Usa's 'crush' on Mamoru as character-personality-building-stuff. She admires Mamoru for saving her. She admires him as a role-model. She admires him because he is not-her-father yet... (she doesn't hit on the king... just 20th century Mamoru...) Anyways, don't you think she annoys Usagi for fun? ke ke ke...