GM Note: (Interpreting this as an Insight check request. I will note that Kinu's Insight is not great.)
spoilers:end of spoilers
The mark is indeed magical in origin, though not in any script that Kinu has seen before. It centres on a large jagged symbol burnt onto the back of her hand with smaller writings in the same style circling around and in a trail that flows from the circle and wraps around her wrist like a cuff.
Kinu doesn't have the technical training codified magic to read the words or understand what the terms of this bargain she seems to have struck is. From her instincts, it seems like she is now holding the leash of this demonic creature.
The hellhound staggers upright. Bolstered by Kinu's lifeforce, it is still very weak and makes it a few steps before collapsing down onto the damp ground to rest. Its gaze is focused on Kinu though, looking at its new master with an expression that could optimistically be described as curious.Flitting her gaze up to Jane and the others for a moment, she flicked her wrist a few times as if to fan out the burning sensation.
"Heh, nothin' to it. All you gotta do is speak their language, and make sure they're listening!"
Standing to her feet, she looked down at the back of her hand one last time before dusting her palms together.
"Not...quite sure what happened, exactly. It's like, I willed for the little hound dog to stick around, and something passed through the both of us," Kinu continued, "Let's make sure it knows who's boss."
With that, Kinu began to lift the stone column to give the hellhound a way to wiggle out.
It is hard to read much humanity or personality into a creature whose appearance is best described as a the flesh of a flayed crocodile hung on the skeleton of a wolf but, for now at least, it seems peaceful and content to just rest.
Trevor is suitably shocked. He saw Kinu make some kind of pact with a demonic creature. Krys is able to see his generally positive impression of the brightly coloured warrior warring with his engrained fear and distaste for the occult. The creature itself seemed so diminished and weak in its present state that it was almost hard to connect it with something that was a threat.
He reaches out and taps Kinu on the arm.
"Mistress Kinu," he says slowly, clearly picking his words carefully, "Are you okay? Are you hurt? Why did - why have you let it out? I don't - I don't know if we can trust it. It's an infernal creature, could be sneaky like,"