In a mischievous manner.
In a roguish manner
in a disobedient or naughty way;
‘he behaved badly in school’; ‘he mischievously looked for a chance to embarrass his sister’; ‘behaved naughtily when they had guests and was sent to his room’;
like a dishonest rogue;
‘he roguishly intended to keep the money’;
in a playfully roguish manner;
‘he winked at her roguishly’;