Spider Demon Father is a member of Rui's Spider Family.

Tier: 9-A, higher with Metamorphosis

Classification: Demon

Powers and Abilities: Superhuman physical characteristics, enhanced smell (Demons can easily smell blood and poison being able to differentiate more or less nutritious blood types), limited information analysis (Demons can perceive details like blood type, sickness and genes), regeneration (High-Mid. Even after being reduced to a decapitated head, a low-level demon would have still been capable of regenerating if his head were to be "completely crushed"), immorality (Types 1,2 and 3), self-sustenance (Type 3, Demons don't sleep), extrasensory perception (Able to sense the presence of others and malicious intent, this can be used to differentiate humans and demons, determine how strong someone is to a certain extent or detect an enemy in the vicinity), body control (A low-level demon could grow hands from its head after it lost its body), transformation (Via Metamorphosis), resistance to disease manipulation (Demons don't get sick)

Attack Potency: Small Building level (Can hurt Tanjirou and Inosuke. Swung a tree), higher with Metamorphosis

Speed: Hypersonic+ combat speed with High Hypersonic reactions (Comparable to Tanjirou and Inosuke), higher with metamorphosis (Moved too fast for Inosuke to react)

Lifting Strength: Class 25 (Superior to demons that can easily rip humans apart. Swung a tree)

Striking Strength: Small Building level, higher with Metamorphosis

Durability: Small Building level (Tanjirou and Inosuke had problems with slashing him), higher with Metamorphosis (Inosuke's sword broke without dealing any damage when he tried to slash him)

Stamina: Infinite (Demons don't tire)

Range: Extended Melee Range

Standard Equipment: None notable

Intelligence: Average

Weakness: Sunlight reduces him to ashes. Wisteria flowers are poisonous to him.

Notable Attacks and Techniques:

•Metamorphosis: The father spider demon possessed the ability to shed his outer skin in order to transform into a more powerful form with increased physical power and regenerative abilities, making him even stronger and durable than his original form.