Complex sentence: The player's commander in the resistance serves as the player's operator and also the superior over Rosary and RD. Fran remains as the Leader of the resistance however she aids the player as an operator during solo missions which Leon covers for Fran as an Resistance Leader.
Split into simpler sentences: The player's commander in the resistance and serves as the player's operator. She is also the superior of Rosary and RD. Fran is the Leader of the resistance however she aids the player as an operator during solo missions during which Leon covers for her as the Resistance Leader.