Lucky Clover
An elite quartet of Orphnoch within Smart Brain who are "cream of the crop"; in other words, elite assassins, and answer to the Chief. Only two of the original four survived.
Kitazaki / Dragon Orphnoch
Kitazaki is a young man that is the most powerful and youngest of the Lucky Clover group, referring to himself as the 'strongest lifeform,' able to transform anything he touches into ash. This talent also made Kitazaki withdrawn from society and have a childish outlook on the suffering of others as fun. He was the one who brutally murdered all members of the Ryusei School. Upon making his presence known in Episode 28, he used the Delta Belt until he tired of it and gave it to Sawada. Kitazaki had a flawless victory streak until he battled Takumi as Faiz and suffered his first loss, driving him more insane. By 49, he was intent on killing Teruo to prove his superiority, with Saeko and Takuma forced to fight him to protect the boy. In the end, a very weakened Kitazaki was killed by the Arch Orphnoch before the monster ripped his face off and ate it.
Saeko Kageyama / Lobster Orphnoch
Saeko Kageyama is the calmest of the group, she works as the proprietor of the Clover Bar. Her calling card to her victim is to send them a bottle of wine, which turns out to be their final drink. She enjoys seeing others suffer and comforts them in a somewhat disturbing fashion. Upon learning of the Orphnoch breakdown and the Orphnoch King's power, Saeko was intent to survive. Saeko succeeded by allowing the Arch Orphnoch to completely evolve her, removing all traces of her humanity, and thus became his caretaker after he was defeated by Faiz. She first appeared in Episode 11.
Itsuro Takuma / Centipede Orphnoch
Itsuro Takuma is a prideful man who enjoys reading poetry and even though he acts calm, Takuma was very much fearful of Kitazaki most of the time. To hide this, he would acting tough whenever Kitazaki is not around or is too injured to fight back. His repeated defeats during the series costed him a great deal of stability in Lucky Clover, becoming a whipping boy for Kitazaki to pick on. Eventually, after seeing the Arch Orphnoch kill Kitazaki and later evolve Saeko, Takuma ran off during the final battle and decided to join human society as a construction worker. He first appeared in Episode 11.
Jay / Crocodile Orphnoch (11-19)
Jay is the first of the Lucky Clover sent after Faiz in the form of the Crocodile Orphnoch. He had the ability to regenerate from attacks that would kill a normal Orphnoch, but this only last two times. A large, strong, usually silent ebony-skinned man who spoke perfect Japanese, usually seen with his pet dog, Chaco. After being killed by Xeno Clash twice, Jay was reluctant to continue his pursuit on Faiz until Murakami threatened him with being named a traitor and what would come of Chaco if he didn't complete his mission. Though Jay was finally killed by Faiz's Grand Impact, Chaco ended up in the care of little girl Keiko Kurata.

Aki Sawada / Spider Orphnoch
Aki Sawada was formerly of the Ryusei School, he was mortally wounded by Kitazaki on the night of the school reunion and soon revived in Smart Brain experiment as the Spider Orphnoch. Before his change, Mari remembered him as a kind-hearted man. Turning his back on his former friends and humanity, Sawada murdered Saya to get the Delta Gear in order to become the new member of Lucky Clover. He has a habit of crafting animal origami and lighting them on fire just before going on a killing spree. He also listens to rap music at the same time, when the flame dies out the same time Sawada kills the last person. He was eventually branded a traitor by Murakami for giving the Delta Belt to the surviving Ryusei Students, before going after them one by one. No longer a member of Lucky Clover as he still had a shred of humanity left in him, Sawada was seemingly killed by Takumi upon revealing his Orphnoch form. But Sawada survived and began to regain a bit of his humanity, to the point he had a mental breakdown while taking Takumi's place in fighting the other Lucky Clover members. Afterwards, he sustained injuries from fighting all three of them (Dragon, Centipede and Lobster) and being hit by Kaixa's Gold Smash. Sawada eventually crawled out of the battlefield and saw Mari one final time before dying. He first appears in Episode 26 and dies in Episode 40.
Series:  Kamen Rider 555