That damage is going to get all the worse when Shionne gets the bomb in her sights; a blast of fire paints the sea monster a vivid red, and pushes fire into the strained points of muscle. Burning and strain both serve to blast through the tentacle, with a suitably brutal amputation.

"...It didn't like that."

Shionne manages, over the shrieking the monster gives out. It looks like the creature is already drawing away from the amount of pain they've visited on it.