#I think I need to perform a taste test on angel juice to answer this

[canon-gabriel-quotes]

my headcanon is that the black part is a suit, but it's holding Gabriel in human shape. Like if the bodysuit tore dude's angel body would just start leaking out of it like a puddle of holy light. It's all angel juice in there

(Just going to answer both at the same time)

Interesting theories everyone but

you seem to have forgotten

the blood

Where is it coming from

Is angel juice fancy blood. Is it like a protein shake for machines

Is the 1 cm virtue like a black hole that is full of extremely dense goop

Much to consider