Unfamiliar || One Piece x Reader

Around the age of 13, every child receives a familiar. The familiar received is based on multiple factors, and ultimately decides the child's fate, for it gives the child whatever powers or skills it can. If, by chance, either it is celestial, a strong familiar, or the child is powerful using the familiar's power, the child has the option to attend a high end academy once old enough. These children become heroes or sidekicks. Most get average familiars, helpful with basic tasks and jobs, or occasionally more advanced skills such as engineering, design, and more. And well known in the world, there's the (L/N) family, known for it's particularly strong familiars. Until, a girl named (Y/N) changes that.
Disclaimer: None of the characters are mine, but the plot and world are.