[Dark quirks an eyebrow, but the usual playful look on his face is gone, and his grip on the chain is closer to a master about to lay some heavy punishment on his misbehaving dog.]

I think I'm just making sure you know where you're treading, Yokai-kun. You're fun to play with, but I won't tolerate anything you do to Ryou.

Understand~?

[He yanks on the chain, intending to send a painful jolt through Bakura.]