Innate Magical Power - As with the rest of his family, Fumiki has incredible magical energy that in the same vein as his father created a protective barrier around the Hatori family apartment keeping the neighbors of Japan away.
The name Fumiki means "history" (史) (fumi) and "brightness, radiance, shine, sparkle, gleam, twinkle" (輝) (ki).
Fumiki's surname Hatori means "feather" (羽) (ha) and "bird, poultry, fowl" (鳥) (tori), which literally means "wing of a bird" altogether.
↑Mahou Tsukai no Tsukai Manga — Vol. 9 Chapter 42,
The name of each family member is revealed.