Communication is important when coordinating the fight against demons. Thus, each member of the Demon Slayer Corps is assigned a black crow who can talk and pass messages. Despite looking rather alike, each of the crows have their own personalities and traits, such as Tanjiro's being intelligent and prideful (frequently calling Tanjiro a "bird-brain"), Tengen's crow being fashionable and Muichiro's having long eyelashes and being abrasive to others.