Suggestions by @jesselee

The Penguin (Oswald Cobblepot)

as The Penguin in Kay And The Last Sword

The Joker (Character)

as The Joker in Kay And The Last Sword

The Shape Japer

as The Shape Japer in Kay And The Last Sword

The Numbertaker

as The Numbertaker in Kay And The Last Sword

Spooky Spoon

as Spooky Spoon in Kay And The Last Sword

The Problem Blob

as The Problem Blob in Kay And The Last Sword

Anakin Skywalker (Darth Vader)

as Darth Vader in Kay And The Last Sword

Emperor Sheev Palpatine (Darth Sidious)

as Emperor Palpatine in Kay And The Last Sword

Count Dooku (Darth Tyranus)

as Count Dooku in Kay And The Last Sword

Boba Fett

as Boba Fett in Kay And The Last Sword

Jango Fett

as Jango Fett in Kay And The Last Sword

Jesselee

as Jesselee in Kay And The Last Sword

Kelly Chen

as Kay in Kay And The Last Sword

James Edson

as Emperor Lee in Kay And The Last Sword

James Adomian

as Tao Shen in Kay And The Last Sword

Taras Los

as Peng Li in Kay And The Last Sword

Dominic Badguy

as Dominic Badguy in The Bright Sword

Constantine

as Constantine in The Bright Sword

Jonas Armstrong

as Matthew in Night School

Linda Armstrong

as Linda Patel in Night School