I'm with Chuck. The cultist has advantage on saving throws against being charmed or frightened.
Cult Mask. Choo-choo Charlie will not attack cultists if they are wearing a cult mask. If a Cultist is disarmed, they lose their mask and must roll a DC 10 Charisma save. On a successful save, Charlie recognizes them as an ally and ignores them. On a failed save, Charlie sees them as an enemy and may attack.
Scimitar. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 7 (2d6 + 1) slashing damage.
Double-barreled Shotgun. Ranged Weapon Attack: +4 to hit, reach 15 ft. cone. Hit: 7 (2d6 + 1) piercing damage. This weapon requires the reload action after two attacks.
Cut and Run. As a bonus action, a Choo-Choo cultist can yell "I don't wanna die" and take the Disengage action and attempt to flee. If they do so, their movement speed is halved. Attempts to flee or disengage that do not use this ability do not experience any movement penalty.
Description
Members of Choo-Choo Charlie's cult are actually hapless mobsters drawn into Warren's evil plot. They wear garish masks to prevent Choo-Choo Charlie from attacking them. They are primarily in it for the money, but a few swear allegiance to Warren's dark power and his nefarious plot to hatch more Charlies and take over the world. Cultists do not know each other by design. If they feel they are going to die, they are prone to flee. Many of these cultists also show signs of insanity due to their constant exposure to Charlie's evil influence.