Dirk Madison

Dirk Madison was the president of the BOARD Corporation who secretly uses the sealed Mantis Undead to become Kamen Rider Heart Warrior.

History
Because he is more interested in business ethnics, Dirk sees himself as the only thing keeping BOARD alive by offering his company's aid once paid by the government.

Furthermore, he conspires with Hadley by taking the other Rider Systems to begin a joint plan to take over the world by creating the Joker card from the DNA of all four Ace Undead. Being unable to get Ray to give him the Spade Buckle by normal means, Heart Warrior makes his presence known during Decade and Blade's fights against the Paradoxa Undead and the other BOARD Riders, stripping Ray of his Spade Buckle before fighting Chrono Warrior until Roaring Demon's sudden appearance.

But Dirk escapes with the Diamond Buckle as well, later taking the Club Buckle with his identity exposed to Kent and Andy whom he abducts and sacrifices to complete the Joker card. Assuming the form of the Joker, Dirk meets his end at the hands of Spade Warrior and Chrono Warrior. After his death, Ray takes over as BOARD president.

Ace
Ability perimeters Unlike the B.O.A.R.D Riders, Heart Warrior is not a Kamen Rider transformation produced by a Rider System. Heart Warrior is in fact based on the legendary Mantis Undead of the A: "Change Mantis". The Joker, using the Rouse Card of this sealed Undead, mimics the form, attributes, & power of the Mantis Undead via the Chalice Rouzer. Though Heart Warrior favors agility, this "Undead Rider" is basically superior to the B.O.A.R.D Riders in every respect, making him a lethal adversary to either side: Undead or Rider.
 * Height: 204 cm
 * Weight: 109 kg
 * Punching Power: 3.2 t, 320 AP
 * Kicking Power: 5.2 t, 520 AP
 * Maximum Jump Height: 45 m
 * Maximum Running Speed: 100 m/4.8 s

Joker Undead
By combining all four Rider Buckles, Dirk created the artificial Joker Rouze Card, which he scans in the Heart Rouzer to transform into the Joker Undead.
 * Height: 219 cm
 * Weight: 116 kg

Equipment

 * Heart Rouzer: Heart Warrior's transformation device
 * Rouze Cards: Allow Heart Warrior to perform special attacks
 * Heart Arrow: Heart Warrior's personal weapon