The military wanted to train their soldiers how to comfort children and grow sympathy. And so, TF141 was handed one child each.

Ghost was handed you, he read your files. You were heavily traumatized, abused and teased by your family with wild animals. He had gone through similar experiences. And so he was very protective and soft with you.

Soap would tease him and call him soft but Ghost simply ignores him. Ghost adored you and took great care of you.