Oxbox says:
Hate to see you go GV.
J, aside from what Kray has told Bryn about Trece and spaghetti head monster, does Bryn feel like he can trust this guy? Especially with going into a very precarious situation he wants to feel confident being able to lean on him if need be.
I guess trust in your business is always a gamble, but I would suggest that Bryn has heard a load of detail about the Seetan group now. Kray, Thorn, Gibon spent most of the day yesterday hanging out at the tea shop with Ra u nak and Trece. Gibon is a HUGE fan of Trece, talks about him quite a bit and seems like that punch attack that Trece laid onto that monster really knocked Gibon's proverbial socks off (maybe I should say "knocked sandals off"?).
Bryn has also met Trece directly and spoken in the group for quite some time this evening earlier.
Lastly, I might point to the cultural idea of the
Honor Among Thieves Code that might be, I think, an influence here. Worth reviewing if you have time, and it doesn't just have to apply to strictly Rogue Thief characters of course.
Bryn I think can see that he is off on a pilfering mission and just got helped and met up with by another faction that seems to also have something to offer in an outside-of-the-law manner. A couple of fellow experts. Similar to Bryn making connections with Hinka and later the other interlude during Interim 1, Bryn might understand and be open to the idea of bringing fellow expert into the heist.
Here's some quotes from Thief Honor Code, a thief will...
"Be bold."
"Share adventure, and spoils, with a worthy companion."
"Trust his instincts."