Thomas heard the raised voiced long before his name got dragged into it, and normally he'd just go on ignoring the spat, but there's something off about Abigail's tone.

And while he doesn't think Raph would ever actually lay a hand on his sister, he's felt first hand what the Shang is capable of. This is why he takes the gifted sword from behind the bar out with him to the yard.

"Oi! What's all this then? Why don't we take a step back so that cooler heads can prevail."

Which is a hell of a thing to say when you enter a fight armed, but Thomas is hoping the sight of the sword will remind Raph more of his promise to them than of an attack on his person.