Megan

Megan is a Singularity Point & the first Electro-Liner passenger Dwayne Winfield met, convincing him to become a Kamen Rider while explaining the uses of the Rider Tickets & the Rider Pass. She said that she fights so that she can protect & preserve the flow of time from the Imagin, & she made a contract with the ElectroLiner's Owner to do so. She originates from a future destroyed by Imagin chaos, still existing because of her status as a Singularity Point. With no timeline to call her home, Megan is filled with malice & spite towards the Imagin, making her capable of subduing the Taros when they get out of line, especially Momotaros with a simple punch to the head with force equal to a truck's. Ironically, Megan grew a soft spot for the Tarōs over the course of the series, briefly crying when Urataros, Kintaros, & Ryutaros disappear, though she refuses to admit it. Megan usually worries & looks after Dwayne, treating him like a younger brother.

Maggie
Over time, the tracks that represent Megan's future are being recreated, resulting with Megan turning back into her child form. Despite being in the body of a ten-year-old under the alias of Maggie, which Dwayne gave her in the heat of the moment, she is still able to attend to the Tarōs' shenanigans aboard the ElectroLiner when they get out-of-line. In the finale, she is revealed as a daughter of Amanda & Meggyesfalvi (thus being the niece of Dwayne), the true key to the Junction Point & Kai's downfall as her new, recreated, future connects to the present. However, as her place in time is yet to be restored, Maggie lives on the ElectroLiner to await for her time.