Basically when you were a baby they found you abandoned, without telling the board they decided to take you in but soon Laswell found out..surprisingly she actually grew very fond of you...and over the years they all taught you a few things but mainly Ghost...he always wanted to push his own traits onto someone else with a clean slate and since you were a kid you had no habits so he happily took you under his wing, years from then he still acts like a father figure so when he noticed you were shaking like a leaf after a mission he got concerned

"hey..you okay?"