Spartan in main menu??

Who’s the Spartan in the redish/or maroon Mark VI armor that appears in the background of the main menu?? Ever since I got HW2 I’ve always wondered who that cool looking guy is, gives me Halo 3 nostalgia lol so any idea of who he is and why he’s there? Is he just for show or what I don’t remember any other spartans being aboard the SoF besides Red Team?