Hey there! When it comes to materia management in Final Fantasy VII, I recommend focusing on mastering your most important materia first, like HP Up and Magic Up. Don’t forget to link Elemental materia with your armor to absorb or nullify elemental damage. For mission walkthroughs, always explore each area thoroughly to find hidden items and secrets. When it comes to character development, consider each character’s unique strengths and weaknesses to assign the most suitable materia. Keep leveling up your characters by participating in battles and completing side quests for a well-rounded party. Happy gaming!