Father Spider Demon  

, 蜘蛛の鬼（父）

The Father Spider Demon, a member of the Spider Family, was known for his dark brown skin with a red dot design extending from his shoulders down to his arms. He resembled a gigantic spider with several eyes and pincers in both cheeks, while also having long pale white hair reaching across his shoulders. The Father Spider Demon's unique trait was his face that resembled a giant spider. Despite being the physically largest of his family, he was devoted to them, as seen when he repeatedly told Tanjiro and Inosuke to stay away from his family while attempting to kill them. He seemed particularly protective of his role as "Father" in Ruis fake family. However, it was also shown that he could be abusive towards his wife, physically slashing her without stating any reasons due to her being weaker than expected.