Mayl Sakurai is Lan's next door neighbor and close friend. Her net navi Roll is always there for Mega Man and shares the same relationship with him that Lan shares with Mayl. Mayl is often worrying about Lan whenever he's on an adventure. Her intuition is second to none.
She is featured in the games many times, even battling Lan on occasion. The only time that her and Lan fought was in Battle Network 4: Red Sun and Blue Moon.