Madeleine has been entrusted to Best Butler Family in Britain with her older sister.
Since she was too young to be trained as maid with her older sister, she couldn't finish maid studies with her sister. She finally finished the maid studies recently and grouped with her sister as a team to protect their master.
She is not skilled enough yet, but since always her sister Mary Jane is with her, nobody can look down on her.
"Please trust me. Master!"