|Villain Type:||Royal Club Undead|
|Season:||Kamen Rider Spade Warrior|
|First Appearance:||Episode 18|
|Number of Episode Appearances:||2|
Artemis is the human form of the Serpent Undead, the Category Queen of Diamonds Undead.
A medusa-like monster that is hunting for the Joker, having the Tortoise Undead to aid her. Her hair changes to snakes & can be used as whips, & she has that hysterical laugh all the time, even in public, somewhat a psychotic person. She was wounded by Keanu Haight, Dirk Trent's look alike, & sealed by Heart Warrior, who gives the sealed Absorb Serpent card to Diamond Warrior to successfully assume his own Jack Form.
- Azumi - Kamen Rider Blade counterpart at Kamen Rider Wiki