Since Riptide's clothes and hairstyle are already existing clothes in the game, it was kinda easy to make this.
Credits: @PlasticDino - Creator of Riptide @Socks_star - Designer(?) of Riptide @Socks_star's project - https://scratch.mit.edu/projects/470202485 Blender 2.8 - 3d Program Model Resources - Splatoon 2 Models