A suggestion for the underground space would be,if you have a yandere and the underground space,the yandere could take you there when you have become immobile and strap you to the industrial feeder and keep you there and there you could convince the yandere to grow together and after the yandere is immobile you could call someone in order to remove the feeder from you and if you call a feeder type personality they would leave you there to grow,something like when you are a blob at Dizzy's facility and plead to the feeder to let you go.