Overlord is a Japanese light novel series written by Kugane Maryuma. Ever since it was taken over by Enterbrain, it has seen the release of 13 volumes since July 30, 2012. The anime television series consists of 3 seasons with 13 episodes each.
The first season will be live from July 7 to September 29, 2015. The second season ran from January 9 to April, 2018 while the third season aired from July 10 to October 2, 2018. Novel lovers have deemed the third season as not having come up to the previous two seasons.
The two main characters would be Momonga, the veteran Yggdrasil player and the leader of the Ainz Ooal Gown and Albedo, the Overseer of the Floor Guardians of the Great Tomb of Nazarick which Momonga rules.
There has been no official statement as to the characters in Season Four; stay tuned for more details in the coming days.
Considering the demand for Overlord light novels and Overlord anime, Season 4 has more than been expected to hit the screens. The author had already expressed intentions of having the series end at Volume 20 even though there is enough story for more.
Overlord: Season 4 is expected to follow up on the foundation of the Sorcerer Kingdom and the difficulties Ainz faces in leading the nation due to his lack of law-making skills.
The latest season is expected to premiere later this year or the next, even though no official confirmation hasn’t been made by Madhouse. It might be that the availability of light novel material that may responsible for the delayed sequel.