Big Mama owns and runs the Grand Nexus Hotel. The Grand Nexus Hotel is a hotel located in New York City owned and managed by Big Mama. It employs and serves humans, but also contains significant concealed facilities just for Yōkai guests served exclusively by Yōkai personnel. The Grand Nexus Hotel has numerous secret passageways inside the building. There is a portal leading to the Battle Nexus stationed within the Grand Nexus Hotel called the Battle Nexus gateway.