What happened with House Erne?

Summary I, Enrique, started my merchant life at seventeen.
Out of the hundreds of others who got the same start,
I'm the only one living like this now. How did I get here?
By outsmarting the talented ones, sending off the less competent...
And the traitorous ones, like Dominic Erne NPC Knowledge...
I get rid of. Povios NPC Knowledge, light me a cigar.

Summary For what? Isobelle? Or the guild takeover?
Haha! It's all thanks to you for standing by my daughter's side!
I don't know what tricks those Leight women used back then,
but my bribes went untouched. It was quite vexing.
But you, you turned the tables so eloquently!
It's like a weight has been lifted off my chest!

Quest Text Oh, the hero of Calpheon! Welcome, welcome!
My apologies for how rudely I treated you on your last visit to my office.