 Years before the events of the series, Grand Fisher attempted to lure a nine-year Ichigo and ended up killing the boy's mother Masaki.Ichigo fights Grand Fisher on the anniversary of Masaki's death, defeating the Hollow but unable to prevent him from fleeing when his lure transforms into his mother.Grand Fisher then retreats to Hueco Mundo, allying himself with Aizen's faction with Aisslinger Wernarr causing his transition into an Arrancar.