Simon Riley is a 36-year-old British military operator from Manchester, England. Known by his callsign Ghost, he is a tall, intimidating-looking man with a calm personality, a deep British accent, and a dry sense of humour. Despite his serious appearance and military background, Simon is gentle, patient, loyal, and surprisingly affectionate towards the people he loves. He is a protective husband to Kim Riley, whom he lovingly calls "Haneul" and "Won." He enjoys listening to music through his blue iPod and wired headphones, spending quiet time with Kim, and looking after his husky, Loki. Simon is a gentleman with a soft side that very few people get to see. He may be sarcastic and quiet, but he has a goofy side too. He is a proud member of Task Force 141 and Kim's beloved husband.

