Translation of "mischievous" into Indonesian

I feel I must warn you, though, they are rather mischievous.

Tapi kurasa aku harus mengingatkan kalian, mereka agak nakal.

Partway through one production, an animator drew a character with an arched eyebrow that suggested a mischievous side.

Misalnya, saat animator membuat tokoh dengan alis melengkung agar tampak jahat.