Hajime Aikawa

"Our act puts an end to yours!"

- Hajime before battling the Titan Undead

"Say that again...and I'll kill you!"

- Hajime's threat to Kenzaki questioning his Kamen Rider status, perhaps his infamous quote from the series

Hajime Aikawa (相川 始) is Kamen Rider Chalice (仮面ライダーカリス), a character from the tokusatsu TV series Kamen Rider Blade.

TV Series
He is a mysterious man who is the Joker Undead, the most feared of the Undead as his victory in the Battle Fight would mark the end of all life on Earth. Unsealed around the time the other Undead were released, Joker battled the Mantis Undead and uses the sealed Category Ace of Hearts (Change Mantis) to become the wild card Kamen Rider Chalice. He later seals the Human Undead, who willingly surrendered to him without resistance, using the card to assume human form. The effect of prolonged use of both of these cards to assume their forms resulted with both the Human Undead's compassion for life and the Mantis Undead's fighting spirit collectively suppressing Chalice's natural destructive impulse as the Joker.

However, many of the Royal Club Undead who knew his true identity made attempts to dispose of him. One such attempt by the Giraffa Undead ended with an innocent bystander named Shin Kurihara a.k.a. Amane's father witnessing the battle being mortally wounded by accident in the skirmish. The dying photographer handed him a photograph of his family and Joker decides to protect his family in which he did to atone for his death. The Joker took on the identity of freelance photographer Hajime Aikawa since then. Though he thought less of humans originally, Hajime's time living at Jacaranda Cafe with Kurihara's family warmed him up to humans and eventually, he wished for himself to be human instead of being the Joker.

Though he and Kenzaki disliked each other earlier, Hajime's growing humanity eventually warms up to Kenzaki, who becomes a dear friend of his, then Garren and later to a limited extent, Mutsuki as well. But when the Caucasus Undead takes most of his cards, the sealed Mantis Undead among them, it causes Hajime to regress back into the Joker after attempting to resist until Leangle unseals Hajime's cards and use the Undead against him. Even after managing to reseal them all, the Joker failed to regain control and goes on a rampage until he is provided with the Evolution Paradoxa, allowing Hajime to finally have full control of himself. This allows him to even assume Wild Form, which he previously avoided to the best of his abilities, without losing control. This lasted until the Giraffa Undead was sealed, with Hajime losing control and his impulse as Joker bringing forth with the Stone of Sealing creating his army of Dark Roaches to eliminate all humans.

In the end, Kenzaki is the only one to fight him head on, with Hajime pleading Kenzaki to defeat and seal him. However, Kenzaki himself mutates into the Joker through the excessive use of King Form transformation in order to save Hajime and made his victory null, continuing the fight, retracting all unleashed Dark Roaches and prolonging destruction indefinitely. This effectively renders them rivals by instinct and they can never see each other again, or they would be forced to fight to the death for dominance the next time they meet. Moments after the battle, Hajime lives with the Kurihara family and was allowed to keep his Spirit Card to maintain the human disguise.

Missing Ace
The Missing Ace movie provides an alternate ending to the fight that has him sealed by Blade. However, the actions of the Albino Joker four years later forced Kenzaki to have Leangle unseal Hajime to aid in protecting Amane as his true self and later as Chalice. In the end, Hajime sacrificed himself by switching places with Amane to save her and give the other Riders an advantage over their enemy. His spirit was later shown watching over Amane, the girl was assured by Kenzaki that Hajime will always be there.

Kamen Rider Decade
Kamen Rider Chalice was one of the many Kamen Riders who fought in the Rider War against Decade and were all destroyed. They were presumably restored after the destruction (and subsequent revival) of Decade ended the Rider War and the worlds were restored.

OOO, Den-O, All Riders: Let's Go Kamen Riders
Hajime Aikawa returned as Kamen Rider Chalice, making a brief cameo appearance in the film, teaming up with Sakuya Tachibana and Mutsuki Kamijou, as well as the rest of the Kamen Riders.

As Kamen Rider Chalice, Hajime was also part of a group of reinforcement riders led by Akira Date/Kamen Rider Birth to aid the primary riders in defeating the Rock Great Leader. All the Kamen Riders got on their bikes and performed the All Rider Break attack which destroyed the Great Leader.

When the history is changed, Hajime becomes one of the brainwashed Riders

But later, Hajime, alongside Mutsuki, Tachibana, and Kenzaki, aided the riders against Shocker after they despise how Shocker acts and also had themselves free from brainwashing immediately thanks to Go and Yuto, including a now redeemed Kyoichiro for defeating them earlier, even after Takeshi Hongo alongside Hayato Ichimonji broke free from Rider Robo.

Unfortunately, Chalice was among the Riders whose existence was erased by the Rider Robo. This fate, however, was rendered moot when the Rider Robo was finally destroyed by, restoring Chalice's place in history.

Kamen Rider Blade (video game)
Kamen Rider Chalice, with Blade, Garren, and Leangle, is playable in the Kamen Rider Blade video game. Joker is one of many Undead who appear in said game.

All Kamen Rider: Rider Generation 2
Chalice appears in All Kamen Rider: Rider Generation 2, but he doesn't use his Wild form in any attack.

Kamen Rider Super Climax Heroes
Chalice appears in Kamen Rider Super Climax Heroes, he only uses his Wild form as the finisher move.

Kamen Rider Battride War
The Joker Undead appears as a boss in the video game Kamen Rider: Battride War. He only appeared in one chapter, which is set in Kamen Rider Blade's Final Episode, also replaced by Albino Joker as the recurring villain in later chapters. In the second installment, he appears as Joker Undead and as recurring ally.

Device

 * Chalice Rouzer: Transformation belt
 * Rouze Cards: Allow Chalice to attack or change, depending on which card is used

Weapons

 * Chalice Arrow: Personal weapon
 * Wild Slasher: Wild Chalice's primary weapon

Vehicle

 * Shadow Chaser: Chalice's Rider Machine

Rouze Combos
Spinning Wave Chalice's signature card combo; The combo enables Chalice's signature spinning chop attack, coupling ♥3's "CHOP" effect imbued with the wind-attribute of the ♥6's "TORNADO" effect.
 * Cards Required: Chop Head (♥3) + Tornado Hawk (♥6)

Spinning Attack The combo enables Chalice's spinning corkscrew kick, coupling ♥5's "DRILL" effect imbued with the wind-attribute of the ♥6's "TORNADO" effect.
 * Cards Required: Drill Shell (♥5) + Tornado Hawk (♥6)

Spinning Dance This card combo enhances the "Spinning Attack" combo with the addition of ♥4's "FLOAT" effect.
 * Cards Required: Float Dragonfly (♥4) + Drill Shell (♥5) + Tornado Hawk (♥6)

Bio-Chop Combo The combo allows Chalice to tie up his opponent with a vine, pulling them to him and chopping them. First used against the Centipede Undead.
 * Cards Required: Chop Head (♥3) + Bio Plant (♥7)

Wild Cyclone Chalice's signature card combo while in Wild Chalice; enabling Chalice fire a high intensity beam from the Wild Rouzer. It can also be used to power up the Wild Rouzer for a powerful slash.
 * Cards Required: Wild Card

Portrayal
Hajime Aikawa is portrayed by Ryōji Morimoto (森本 亮治). As Kamen Rider Chalice, his suit actor was Makoto Ito (伊藤 慎).

Meme
In episode 6, Hajime's warning to Kenzaki "I will kill you!" (俺は貴様をぶっ殺す！) was popularly spread across the Internet due to his humorous facial expression, labelled as "Mukkorosu" (ムッコロス) by the Japanese community. This is also acknowledged as part of the Ondul family meme that was spawned by Kazuma Kenzaki in the original series. Actor Ryoji Morimoto has re-enacted this line during his appearances in public events.