 Viewers of early footage from the developing product encouraged DiDuro to separate it further from Sonic , so he replaced rings with red leaves and altered the characters ' abilities . Ziyo had drawn Lilac as a hedgehog , but DiDuro redesigned the character to be a dragon . Lilac 's wall @-@ jump ability was based on a similar game mechanic from Ristar . Originally , her level of energy was to be dependent on her speed , but this proved too difficult to control . 
