The Ghost of Chalawunga Future is a spirit that warns people of their future lives after they've treated people incorrectly on Chalawunga. The character itself is a parody of The Ghost of Christmas Future from A Christmas Carol, a book written by Charles Dickens.
The Ghost of Chalawunga Future is generally scary but was confused when Banana said he was fine with living the future he warned him about. He possibly has a normal personality outside of his job.
The Ghost of Chalawunga Future is a skeleton with a dark purple substance coming from his skull. He carries chains around with him which are over a long black coat.