The updated character designs for returning characters came from wanting to take advantage of the higher screen resolution and to give the game's characters more detailed and matured identities since the first game, rather than just making another Sonic the Hedgehog-inspired game. Lilac's new design had influences from Mega Man X's armor upgrades to show how much more responsible & experienced she had become, while Carol had minor updates showing she hadn't changed too dramatically, and Milla's more cleaned-up jumpsuit design showed how she grew to take care of herself since her tattered appearance in the first game.