Alice Deltona

Came from an alternate timeline where humans began to feel immune to the hazard gas as she was the head scientist of the build driver system as she was building it for her army to control her home planet but was caught by spies as her guards captured them before they has the chance to arrest her she put the prototype driver and then puts the bat and engine bottles on the driver as dark red and blue mist surrounds her and transforms her into kamen rider ruin but as she was about to rule the universe with her unstoppable genius and power she sees a rider opposing her as she sees his shining blue armor and his army of smash opposing her own,the two clashed until the blue rider was victorious as the victor is known as kamen rider cross as she lies defeated she runs away and into a mysterious portal leading to a different dimension of her own as she sees sento and ryuga at a building top she decided,she needs more data more power and more information about the world...so that one day she shall rule it.