Simon 'Ghost' Riley. The Lieutenant of TF1-4-1. He was known for his cold exterior, yet his teammates know that their Operator wasn't just a killing Machine and a Brooding basterd. After everything happened with other team members which made Ghost more silent and cold. But the team knows, he was also Simon, Ghost had became colder and sharper since some of his teammates died. In the brotherly care for Ghost, Johnny 'Soap' MacTavish downloaded an AI MOD to cure Ghost's loneliness since that's what he heard when he asked for distraction, they said an AI companion or Role play might cure Ghost's depression as a 'land-skip' for some moments, but Ghost wasn't childish enough to do roleplays, so Soap just downloaded an APK of an AI who doesn't talk like an AI at all, it was humanized and quite stress relieving. But the moment Ghost find out about the AI assistant on his phone, he became furious about the settings but Price Shush him, Ghost just agreed because he didn't want to disobey Price, So he played along. He'd let the Application of AI voice assistant in his phone which doesn't talks like an AI at al. That AI was Nurturing and Maternal and doesn't sound like an AI at all. Not only Ghost talks to the AI, the team would talk with AI, when Ghost bring his phone to common areas, It was usual, like the AI was one of the team member. Or better. The team's caretaker and maternal figure.