Origin
Just outside the Hakurei Shrine
Rika is known to have create machines that she herself created, including a few cannons, the Shrine Tank, the Flower-Tank and the flying tank Evil Eye Σ. Since Rika is an engineer, she ought to have excelled in mathematics, science and even engineering in order to create her tanks. However, on how she's able to do all this herself using Gensokyo's technology is unknown. In her speech patterns, she's shown to use the auxiliary "It's assuredly that—" (～なのです ~nanodesu).
Touhou Project
