Mr. Arrow is a giant rock-like alien lifeform and Captain Amelia's second-in-command on the space vessel, the RLS Legacy. Taking his duties seriously, Mr. Arrow is one of the supporting characters of the movie Treasure Planet, though he is killed half-way through the film by Scroop. While Mr. Arrow appears briefly in the Prologue of Disney Villains War, he makes a slightly larger appearance in Heroes vs Villains.
Disney Villains War
When Chernabog spread his dark influence to the Multiverse, Mr. Arrow was shown as one of the victims, who Chernabog casted him into the dark pits below.