a character that acts predictably throughout the story
I think you mean a round character or a rounded character. A person with a rounded character is one who is well balanced and well developed in many aspects.
character round
a character that acts predictably throughout the story
How about: it has a well rounded character!
the main character
a character that acts predictably throughout the story
rounded
round-novanet question
a character that uses their voice without actions
A string is, by definition, a character array. No conversion is required.
A rounded seed capsule of plants such as cotton.
Well-rounded? If you mean it the way I'm assuming you do, then yes, he is.