Negative Traits:
* Cruel: The Warden is undeniably cruel, inflicting harsh punishments and exploiting the boys.
* Manipulative: He uses his power and cunning to control the boys and hide his true motives.
* Greedy: His obsession with digging for treasure and exploiting the boys for his own gain is central to his character.
* Ruthless: He shows no remorse for the suffering he inflicts on others.
* Tyrannical: He exercises absolute power with no regard for the welfare of the boys.
* Deceptive: He hides his true nature and intentions behind a facade of authority and concern.
* Paranoid: He exhibits suspicion and paranoia, particularly regarding his past actions.
* Vengeful: He seeks revenge on the people he feels wronged him.
Neutral Traits:
* Mysterious: His past and his true motivations are initially shrouded in mystery.
* Calculating: He is a planner, carefully constructing his plans to achieve his goals.
* Ambitious: He possesses a strong drive to achieve his goals, whatever the cost.
* Persistent: He stubbornly pursues his ambitions despite setbacks.
Other Adjectives:
* Cold: He lacks empathy and warmth towards others.
* Power-hungry: He craves control and authority.
* Determined: He is unwavering in his pursuit of wealth and revenge.
* Unpredictable: While often calculated, his actions can be unpredictable and erratic.
Remember that the adjectives you choose should reflect your interpretation of the character and the specific context in which you are using them.