And that's why he had them sign the contracts first. They can't talk without his permission due to those contracts. I think the manga kinda glossed over what those do actually. If you've got a magical contract, don't hesitate to use it to protect yourself. (If you don't have a magical contract...
IDK, seeing Ijin go to town on some fools with a shotty would be fun. Make it real interesting they could give him an old WW1 trench gun with a bayonet.
Thanks for the chapter.