Scenario 1- Kimihito receives a human boy from smith. This boy turns out to be his nephew. The reason he was brought here was that him and his parents were victims of a liminal attack. After the attack, he develops a strong fear for liminals. Because of his newly found fear, his parents sent him over to live with Kimihito, knowing he has liminals in his household, to interact with the liminals. They hope that this will get him to trust liminals again.
Possible plot points -Nephew, a liminal fearing boy, meeting Rachnera, a human "hating" arachne. This could make some interesting interactions between the two. Rachnera could get mad at the boy for fearing liminals, and she eventually understand that he is trying to fix that and she apologizes
Scenario 2- Smith introduces Kimihito and the liminals to a new house member. Instead of a buxom liminal, they get a strange male wearing a body suit and mask. At first, the species of the man is unknown, but it is eventually discovered to be a potentially EXTREMELY unique and possibly dangerous liminal, Like a grey alien, or a "Kaiju" liminal( he could also be a former human who is the result of an inhumane and cruel experiment.
Possible plot points