Spider Demon (Father)

Spider Demon (Father) (also called Father Spider Demon or Spider Demon "Father") is a supporting antagonist in the Mount Natagumo Arc of Demon Slayer: Kimetsu no Yaiba.

He is a member of the Spider Family, a group of demons living on Mount Natagumo and led by Lower Rank Five Rui (who poses as the "youngest son"). Father acts as the family's patriarch and protector.

Physically, he stands out as the largest and most imposing in the family, with an inhumanly tall and robust build, dark brown skin featuring red dot-like patterns on his shoulders and arms, long white hair, and a distinctly spider-like face complete with multiple eyes and large pincers.

He is extremely aggressive, bloodthirsty, and animalistic in behavior, but shows fierce devotion to his "family," repeatedly shouting for intruders to stay away from them during battle.

His Blood Demon Art allows him to undergo Metamorphosis by shedding his outer skin, transforming into an even stronger, more durable form with enhanced physical power and regeneration.

He is ultimately defeated by Water Hashira Giyu Tomioka during the arc.