Fuchou does not want to give the dragon egg to anyone except a dragon and makes that known, he does start trying to get support for a mission to destroy the ghoul detecting device though; only speaking to those that know his situation directly and creating a facade to any of the new people that do not know his situation that he is a terminal patient in a remote hospital who is using his dying wish to help out the group with his drone skills.
He masks the reason for wanting to destroy the device for anyone that would wonder what is so wrong about killing ghouls that once this technology gets out that it could be used to hunt down anyone that the Cowboys don't like based off their "signature" (he is bluffing this reasoning completely) and give them more power than they should have.
He will never appear in person to them and instead tries to carve out a little place in the sewers that he can use as a base not directly under the community center, but close by. He will rig it with traps using his trap building skills to alert him to anyone approaching in a defensive pattern and try to communicate with Carl that he is on board for his mission even if it's only himself that goes.
He masks the reason for wanting to destroy the device for anyone that would wonder what is so wrong about killing ghouls that once this technology gets out that it could be used to hunt down anyone that the Cowboys don't like based off their "signature" (he is bluffing this reasoning completely) and give them more power than they should have.
He will never appear in person to them and instead tries to carve out a little place in the sewers that he can use as a base not directly under the community center, but close by. He will rig it with traps using his trap building skills to alert him to anyone approaching in a defensive pattern and try to communicate with Carl that he is on board for his mission even if it's only himself that goes.