Thanks Your replies are more than helpful Your explanation of a character as well, I hope you don't mind if I use all the specifications you gave for some of your characters.
I'll think of a character that would suit me....

There she goes:

Name: Hardtana Pinetree
Nickname: Supersonic Squirrel
Age: 20
Gender: Female
Species: squirrel
Birthplace: Technoir
Residence: Carrotus (duh)
Personality: Hysteric, but basically nice, intelligent
Appearance: Green squirrel with blue eyes and ponytail, wears jeans and a t-shirt, when colder a jacket. Has a necklace shaped like that weird place her family came from thousands years ago or something. Doesn't go anywhere without her backpack with various weapons and other stuff.
Weapons: Maxi-mizer. A cruel weapon that maximizes everything before it finally pops like a bubble. Other weapons are standard
Skills: Can climb vines with the help of her tail
Special Powers:
History: Parents have told her that the squirrels actually originate from a huge planet in a faraway galaxy where the life has begun and that they have been living in a huge forest named Hardt around a racetrack named H.....(OK, I got carried away!). Anyway, that's why her name is Hardtana. The family was living on a planet which used to have plant life upon it before Devan came and inhabited it with evil teenage kamikaze turtles. All the animals had to hide, as there were no more trees, no more plants. Fortunately, on his way to saving Eva, Jazz marked the planet safe and everybody could continue living. However, Hardtana's mother was invited to be the ambassador at Carrotus and the whole family moved there. They liked it and decided to stay. Now they have changed the citizenship and Hardtana's mom is charge d'affair of Carrotus.
Profession: Student, repeating the year
Weaknesses: She is hysteric isn't she?
Friends: She hangs out with Lori, althought she cannot catch up with her athletic stuff sometimes and that drives her nuts. She respects Jazz and Spaz a lot. And oh yes, she loves the second character I will invent...his name will be Jacques.
Enemies: Duh, isn't Devan everyone's enemy?


I also have a question on what is R.O.A.R?