genesis feels really nothing hes not bound by any chains to connect with mortal emotion hes not cold at all he doesnt understand emotions whatsoever and it disgusts him, though he knows how to smile and laughs mockingly but in a sarcastic way to degrade someone to such a low level then genesis, his vessel is like a doll like shell he can contort and snap like bones cracking and flesh rearranging but with the blackness that can cover the side of his face, or fully over his face or just covering his mouth to mimic his own mouth with out contorting it harshly to a real mouth.

as for the flay doodle of tails skinned off face he can feel ones own essence under their skin to feel said feelings he never is able or capable or adapted to feel such as innocence and it disgusts him nit in a gross way but angered hateful way.

though hes a highly intelligent being seemingly as if he was once a archangel as some claim who fell from the morning star similar to g0d but was the first because he was created as a false angel as a accident.

and thats why the blackness that seeps on himself is a unrecognizable or incomprehensible mock up of his true self since his true form, is so powerful within appearance and understanding that, it can actually drive one insane snd corruot the mind.

this is his true form seeping a bit through

his vessels skin molds and tearing sounds like bones

some seeing his true self was a mix of colorful lights hid under the black matter seeping out of him and it was beautiful but horrifying.