Calamity Payne

Cunning Action. On each of her turns, Calamity Payne can use a bonus action to take the Dash, Disengage, or Hide action.

Sneak Attack (1/Turn). Calamity Payne deals an extra 19 (6d6) damage when she hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of her that isn't incapacitated and she doesn't have disadvantage on the attack roll.

I Can Do Without You! (3/day)  Calamity Payne takes a single revolver attack with advantage as a bonus action against a creature within ten feet. A hit turns into a critical hit against a surprised creature where they must succeed on a dc 15 wisdom saving throw or become stunned until the end of calamity's next turn.

Magic Items. Calamity Payne has a couple of magic items that help them be evil.

Bullet Time Poncho: A stealth tent made by a family of druidic halflings that Calamity stole and repurposed after killing them. The poncho gives Calamity Payne advantage on all stealth checks and gives disadvantage to all ranged attacks rolls made against her.

 Middle Finger of Death:  The middle finger of a lich that Calamity tied down in her pet paladin cage for fun. This is what gives Calamity the 'finger of death' action described below. It also gives her a +3 bonus to her ac (already applied) and resistance to necrotic damage.

Dragonborn Leather boots: Boots made from the skin of the head priest of a dragonborn orphanage. This is what gives Calamity Payne her spellcasting abilities. It also gives her blindsight within 30ft of her.

Spellcasting. Calamity Payne is a 5th-level spellcaster. Her spellcasting ability is Charisma (save DC 15, +7 to hit with spell attacks). Calamity Payne has the following spells prepared:
Cantrips (at will): blade ward, mage hand, chill touch 

1st level (4 slots): disguise self, shield, charm person

2nd level (3 slots): blindness/deafness, invisibility, mirror image

3rd level (2 slots): fly, thunder step

Multiattack. Calamity Payne makes three attacks with a revolver or two attacks with her spiked knuckles.

A Woman's (Chill) Touch. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 7 (1d4+5) piercing damage plus 9 (2d8) necrotic damage. These are necromantic spiked knuckles that on a hit prevent the target from regaining hit points until the end of calamity's next turn.

Calamity's Revolver. Ranged Weapon Attack: +9 to hit, range 5/200 ft., one target. Hit: 11 (1d10+5) piercing damage plus 7 (2d8) necrotic damage. Calamity must use a reaction to reload her revolver after six revolver attacks.

Finger of Death (recharge 5-6). Calamity Payne flips off one creature within 60ft that they can see. The target must make a dc 15 Constitution saving throw. It takes 7d8 + 30 necrotic damage on a failed save, or half as much damage on a successful one. A humanoid killed by this spell rises at the start of Calamity Payne's next turn as a zombie that is permanently under her command, following her verbal orders to the best of its ability.