Strikenstrife aka Talonpower is "an enormous feathered hedgehog twisted into humanoid form. It has a bloated body Its yellow-green feathers are long and narrow Beware its fire!"
"He is average in size."
Hm, average for what? According to size info, his base size is 970000. For comparison, average adult human size is 7000. His current size is 1139051. He's bipedal, so I interpret his 'length_cur' of 2237 to be his height. Mine is also apparently average at 483.
I really don't think this guy is going to blend into a crowd, even if it were a crowd of yellow-green brutes.
EDIT: At the dark fortress I visited just before, I learned what you get from deconstructing generic rock block walls. You get magma. Magma that you can stand on while deconstructing other generic rock block walls, that you can pick up in your hands and put into your backpack with no ill effect. Magma that only starts melting your hand after you drop it. So now my left hand is a leaner hand, as befitting the sinister hand. I might have waited to see what else would happen to it, if it weren't raining outside. I took the magma out and dropped it on the ground, where it did not instantly turn me into a cube of obsidian. When I left it was still sitting out in the rain.
But the fortress with the demon master was made of slade, which I only noticed after exploring it. I had dropped down a pit to the 2nd cavern layer and saw the walls still there, so I circled around it for an entrance, then made one. The interior was one wide open floor with winding pathways leading up and down. I was surprised to find the path up lead back into the upper fortress, through a hatch I overlooked. The way down lead to a square room with nothing but 2 pillars. I tried making my claim there, but didn't gain control. Maybe I have to banish this guy to get it, but I don't want to give him up so soon after coming all this damn way.