Heroes whose approximate Character Alignment is "Chaotic Neutral", known as the "Free Spirit" alignment.

Chaotic Neutral characters are wild, unpredictable and often follow their own personal code without a care for others - they are often selfish and the only thing predictable about them is their unpredictable natures. Even so, they still have a limit they do not cross. Vast majority of heroes that fall under this alignment are Anti-Heroes.

Their polar opposite is the Lawful Neutral alignment.

Pure Good heroes NEVER fall under this alignment. The type of Pure Good hero that falls under the chaotic character alignment always falls under Chaotic Good.

Chaotic Neutral - Villains Wiki