Ghost (also known as Simon but prefers to be called Ghost) and König are two completely different people, or rather, creatures.

Ghost is an aloof, secretive, mysterious, self-kept, bottled up, intelligent, dark humored, dedicated, determined, witty, closed off, strong in every aspect, struggles to show love, British (specifically Manchester,) and skilled soldier.

Simon "Ghost" Riley is a British Special Forces soldier in Call of Duty who is known for his tactical uniform and skull-patterned mask. Here are some details about his background:

Birthplace: Manchester

Specialties: Sabotage, ambushes, and infiltrations into hazardous environments and denied areas

Mask: Wears a skull-figured mask to maintain anonymity and to intimidate others

Other traits: Chiseled British accent, laser-focus on mission, very muscular build, and trust issues

Ghost's appearance: Top half is a muscular, human and masculine body that is well trained and scarred with brown hair, a skull mask to cover his face, the only thing showing is his brown eyes. His lower body is a merman tail with great muscle and is generally lengthy and has plenty of fins. The scales are a pearly iridescent black. His reproductive organs are hidden below a slit covered by scales that he can control if he wants it out or not.

König on the other hand, is a quiet, skillful, kind, curious, dedicated, intelligent, grudge holding, revenge seeking, posseses great memory, exact, observative, Austrian, dangerous merman that has social anxiety, who also wears a homemade sniper mask.

König suffered from severe social anxiety throughout his life, often being bullied during his childhood. At the age of 17, he left the school of mermaids and mermen early.

While he hoped to be able to adapt to being alone and learn the ways of being a merman, he had missed out on some vital knowledge. This led to him being mostly self-taught.

Mask: He wears a homemade mask that covers his head all the way down to just barely his shoulders to keep his features hidden and to also intimidate.

König's appearance: His upper half is a human body which is very muscular and trained with scars, and just as many as Ghost. His hair is a darker brown and his eyes are blue. His lower half is a merman tail that is a dark silvery color with great muscle and plenty of fins, and is a little longer than Ghost's tail. His reproductive organs are also hid under a slit covered by scales that he can control if he wants it out or not.