Emma Tao

Emma Tao was a member of Yggdrasill Corporation who uses the Peach Energy Lockseed through the Genesis Driver to transform into Kamen Rider Marika. Initially Sengoku X's subordinate, she becomes intertwined with Baron Tomsen after noticing his leadership during the Helheim Invasion. She would faithfully follow Baron in hopes of helping Baron become the man that would obtain the Forbidden Fruit.

Personality
Emma was a quiet soul, but she had a tendency to use excessive force, as seen by beating Baron down when he loudly got up in a rage during his talk with Sengoku, with Dylan soon joining him.

She seemed to be loyal to Sengoku X, though this was implied to be a facade. She had some kind of personal interest in Baron, which Sengoku notes as strange, as she usually didn't involve herself with others. After Sengoku abandons her, she revealed that her loyalty to him was surface-level and that she sees more potential in Baron.

She had no personal interest in obtaining the Forbidden Fruit, preferring to see ambitious people like Baron reach for its power.

Past
Prior the event where Emma was recruited into Yggdrasill, she was a former spy working for a certain organization. She infiltrated Yggdrasill, getting the files from a lab computer, until she was caught by Sengoku D. Instead of Emma trying to fight him, Sengoku gives her an offer, to work with him in Yggdrasill as his assistant and bodyguard in which she eventually accepted.

During the testing period to realize a functional Sengoku Driver, she thought highly of Troy "Cage" Knight and Sengoku X. However, to her confusion, Ryoma tells her to not forward the images of an higher-intellect Inves to Troy, but to him directly, instead.

Yggdrasil Saga
When Amror Warrior attempts to stop Akira after his descent to an Inves, she along with the other Yggdrasill members transform. She spectates Sigurd as he kills Akira. Serving as a bodyguard for Sengoku X, she easily defeats Dylan and Baron, both trying to escape and also take back their Drivers without Sengoku realizing. During Armor Warrior and Baron's escape from Headquarters, under the guise of Marika, she stops Sigurd's fatal shot towards the two Kamen Riders. After Drew "Cage" Knight became the company's newest member before his first task, Tao and Sengoku were told by Sigurd about Drew's inner darkness, and thus reveals to be true as Sigurd suspected. Emma assists Drew, with the help of the Charmant owner, Alfonzo and the former Kamen Rider Jonathan to retrieve the Sengoku Driver from Dylan by kidnapping his sister. The plan fails when Alfonzo reveals he'd rather use a clean way of kidnapping his sister, which also sabotages Jonathan on switching his Acorn Lockseed with a fake one when he's about to transform and torture his sister while posing as his patissier assistant. After Spike is beaten by Armor Warrior in Lemon Raiment Arms, she appears to fight him. As she manages to evenly match Armor Warrior, Drew, who transformed into Dragon Defender shoots Marika and telling her that he will protect Dylan.

Arms
Like his fellow Lockseed-using Armored Riders, Kamen Rider Armor Warrior's forms are called Modes while the armor is called Arms.