Firstly, I need to identify the role of the character: Is it a warrior, an assassin/carry or a support character? Is it melee or ranged? What’s the difficulty of playing this character? Will it be a good fit for the existing character web?
Secondly, I would like to define the traits of the character. Make sure the character has unique mechanics among other characters.
Thirdly, design the background of the player that fits in the game world.