Muzan Kibutsuji is a fictional character in the manga and anime series “Demon Slayer: Kimetsu no Yaiba.” Throughout the series, Muzan has many demons under his control and does not show any particular favoritism towards any one demon.
However, there is one demon who has a special relationship with Muzan. That is, Tamayo, a demon who was once a human, but turned into a demon after being experimented on by Muzan. Tamayo is the only known demon who has been able to develop a cure for demonization, and her research is a threat to Muzan’s plans for the demon race. Despite this, Muzan is somewhat fond of Tamayo due to her unique abilities and intellect, and he considers her a valuable asset.
Who was muzans favorite demon