Assistant Marrow is a Non-player character discovered after completing Enlightened Journey. Players can talk to him to use the hot air balloon system. He is employed by Auguste and handles the Castle Wars flight path. He works part time while studying to be a doctor.
Dialogue
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Trivia
All of the balloon transport system NPCs appear to be references to Star Trek. Assistant Marrow is likely a reference to the character Dr. Leonard McCoy from Star Trek: The Original Series, due to their similar names and Marrow's dream occupation of being a doctor. Since Dr. McCoy's nickname is "Bones", Marrow's name is likely a play on bone marrow.