Wikipedia
Mmanwu is a traditional masquerade of the Igbo people of southeastern Nigeria. Their culture revolves around work and entertainment; the Igbo people, masquerade is a major form of entertainment. The masquerade revolves around their community and masquerades can differ from village to village. Masquerades generally last for a few weeks. However, some may span over a few months. These events are frequently performed during the end of the harvesting season and the start of the new planting season. There are some Igbo that perform masquerades throughout the entire year. Masquerades are used to honor the dead and pray to the gods for a successful planting season. Since the Igbo only know their history through oral interpretation, the origins of the masquerade have been lost.
The Igbo masquerades, mmanwu, are traditional performances acted out by exclusive secret societies within a community. These exclusive societies consist of adult male members. Each member must be initiated into the society. Their identity is known only to the other members. The main function of these societies is to celebrate the harvest and to entertain the village people. Some other functions include enforcing village curfews, protection, and serving as village security guards. The members, also known as masqueraders, wear masks to hide their identity from the rest of the village. The mask is also worn to resemble the spirit of a dead community member. By wearing the mask, a masquerader is thought to have spiritual powers that are conducted through the mask.
The living-dead are what these masquerade/spirits embody. Igbo people believe that the dead never actually die; rather, they remain in a "personal immortal state". They reside somewhere between the earthly world and the spiritual world. These living-dead are believed to be closely related to those of the village. Since men are masqueraders, they are buried within their homes so their spirits may be close to their families (Chiene 10). The living-dead then return to the earthly world from time to time to offer spiritual advice. It is the living-dead, who the masquerade portrays.