Seizeilizei visits Fort

This picture belongs to the story of an android, Seizeilizei from the ancient era.
See also

Seizeilizei finally found a town, that means mankind are still alive and she enter the town... that is actually federation's anti-empire-front-line fortress, Mediggo.
There is no concept of an android among federation (because their civilization is around WW1 level), therefore what they understood about her is just, "something like human".
Federation rises their alarm and intercept her.