What is the significance of the 'Grey Matter' character in Invincible Season 2 (comic)?

Grey Matter's role in the comic is more substantial, showcasing his strategic brilliance and his contributions to the defense of Earth. He becomes a key advisor to Mark and the remaining heroes, using his intellect to analyze the Viltrumites' tactics and develop countermeasures. The animated series utilizes Grey Matter, but his strategic importance is less emphasized.