I thought he slept with him and killed him???
oh if you were talking about minato, they're different person than charles.. minato had beheaded. and as for the promise, i mean tristan promised ethan to not meet charles, basically means he won't sleep with charles. that's why tristan didn't meet charles on the set time, but come late to kill him. but he come with ethan smell on him...
Plz continue!