maybe i was susceptible to this kind of thing, but the first time seeing the colossal titan gave me chills. I'm wondering if something around that size would be sufficient. then there's the idea of altering its features to make it seem less human than human-oid, which could play a role in the effect of the final product. but then what about beings that can stride across continents...would that be better or just seem absurd? stand on the earth and be visible from space? taller than an actual mountain?