Sure, his emotions are not expressed fully, but you can tell that he cares. The dialogue-which I think is the best in the whole campaign-exchanged between Soap & Ghost indicate that Ghost actually cares for Soap. This is especially true in the 'Alone' mission. As the game progresses, you can see that his feelings (and character) change. In the 2nd mission, Ghost meets Soap and noticeably expresses a feeling of dread or something similar, indicating that he wasn't looking forward to working with a seemingly headstrong Soap. His character development is best seen in the relationship that he has with Soap.

This is in contrast to 2022 Ghost, who is a dynamic character that changes over the course of the campaign. 2009 Ghost arguably has no character development whatsoever and he's practically just another grunt who happens to have a voice. 2009 Ghost was shallow, static character and the only reason (I guarantee you) that people thought he was cool was because of the mask and some one liners. My thoughts on this are that 2022 Ghost is a VASTLY superior version because he actually has character development.

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