Shakugan no Shana Vol 5 pg 140

“How’s this!”
It was not a punch. Her hand, from the wrist down, had sunk into its side.
Clunk. Tenmoku Ikko froze, like a doll whose batteries had been removed.
The physical body of this Tenmoku Ikko, and all things called Mystes, is a Torch, a substitute
for a human whose Power of Existence was devoured by a Denizen of the Crimson World.
When a Hōgu of the Crimson World enters this being, which is functionally no different from
a human, a special, powerful Mystes is created, but the nature of being a Torch itself usually
does not change.
The girl had tried to forcibly dismantle the Torch part of this Mystes.
‘Alastor taught me plenty about how to manipulate the Power of Existence—!?’
It wasn’t dismantling.
On the contrary, Tenmoku Ikko moved again. Whirr. Its head turned sideways, looking down
with its single eye, a swirling mix of pale blue-green and wisteria, at the girl whose hand was
plunged into its side