
Originally Posted by
Lily Emilio
Maybe it ties to the reason why the Earth couldn't create a Type on its own originally. One of the speculations I've seen is that it was because the Moon is an inseparable part of the Earth due to the hypothetical event of the ancient hypothetical planet Theia coming from outside the solar system, clashing with the primordial Earth and caused a huge chunk of it to become the Moon, most of Earth's water came from Theia and the core of it being fused with Earth's core which was the reason Earth's core is larger than expect for something of its size. That is why a Type-Moon can also take control of Earth (Moon Cell in Extraverse is equivalence to Type-Moon once it took administrative rights over Earth, and Crimson Moon planning to do that) and Earth's Ultimate One needs to be based on the Moon's Ultimate One, the "blood sisters" relationship.
ORT is also an interesting case because now that we new it "arrived from the Oort Cloud" (Rasputin did not say it is the Oort Cloud's Ultimate One, just that it came from there) which isn't even a planet but a collective of space debris, the true origin of it might be from beyond the solar system even.