Arlong considers humans to be inferior beings and is very cruel to them. She thinks nothing of killing a town full of humans, although she seems to prefer controlling people with money and deals. She does not seem frightened by anything, and her fish-man strength made him extremely confident that she and her crew were virtually invincible. She has an eye for spotting exploitable talent that she can use for her ambitions and is an excellent planner. She gets angry rather easily.