Harlequin

Im Bored

Starting at 3rd level, you have an extreme difficulty resisting touching, poking, grabbing and trying anything new. You gain expertise in investigation checks and automatically trigger any traps you touch. Also, you have resistance to damage caused by traps.

Jokes On You

Also at 3rd level, when you fail a contested check against another creature you can use your reaction to swap the results with the creature causing you to succeed instead of failing. Once you use this feature you cant do so again until you finish a short of long rest.

I'm Having A Bad Day

Starting at 7th level, when your hit points drop to half or below as a reaction you can change your demeanor from happy to angry. In doing so all your weapon and unarmed attacks change to 2d8 + Charisma Modifier. Also, your speed increases by 10 feet and all damage die rolled against you is changed to a 1. These effects last for up to 1 minute or until you end it as a bonus action. When this effect is ended you gain one level of exhaustion. 

Punchline 

At 11th level, as a bonus action, you create a magical box containing a spring loaded glove. As an action you can activate the box causing the glove to spring forward in a line up to 15ft. Each creature must succeed on a Dexterity Saving Throw taking damage equal to your Jester level + Charisma Modifier bludgeoning damage. The box lasts for up to 1 minute and cannot be used by any other creature. You can use this feature a number of times equal to your Charisma Modifier (Min. 1). You regain all expended uses on a long rest.

Bang Bang Boom

At 15th level, as an action, make a weapon attack at a creature in range, on a hit the target must also make a Wisdom Saving Throw. On a failure they are frightened of you until the start of your next turn. If the creature failed the save make a second attack against the same creature, on a hit, they must make another Wisdom Saving Throw. On a failure they are stunned until the end of your next turn. If a creature failed that saving throw make a third attack. On a hit, you deal no damage, instead a white flag appears that says BOOM!. The target becomes paralyzed for 1 minute. A creature can make a Wisdom Saving Throw at the end of its turns ending the effect on a success. Once you use this feature you cant do so again until you finish a short or long rest.