1 - Download the character file named piter_de_vries_from_dune_2021_actor_david_dastmalchian_harkonnen_mentat.chf by clicking on the download button below the picture on this site
2 - Place the file in your Star Citizen game folder: StarCitizen\LIVE\user\client\0\CustomCharacters
3 - Open the game, select the Persistent Universe, then click on Character customization.
4 - You will find a Load/Save button, click it, and look for an entry named piter_de_vries_from_dune_2021_actor_david_dastmalchian_harkonnen_mentat.
5 - Click on the import button