I can't for the life of me (I'm still a rookie DM), find why Sargaeta is the one giving them information about Vyre. I can't seem to find a lead up to him specifically being the one they use for information on the city, unless some of the members of The Silver Council has told them that they know that the Captain has had several visits to the city, which seems very unlikely.
I could use some help figuring this out.
He's probably friendly to the party since they helped him rescue his boyfriend, Marquel, which means he's also the most likely candidate for the party to buy a ride from if they don't want to walk, so him being able to give exposition is an economical use of NPCs.
There's any number of reasons he would know about Vyre. He's a captain in the Chelaxian Navy which patrols the waters and could include port of calls in Vyre--which is a very Las Vegas style location where the elite of Cheliax go to have 'anonymous' fun. Sailors love to party on shore leave.
Maybe Sargaeta writes Travelogues in his spare time. He could be a font of knowledge about every port city in the Inner Sea.
Thanks for the answer, I think I haven't described my problem correctly (sorry English isn't my first language).
They don't have Sargaeta as a member of the council, why is he suddenly giving them advice without being contacted first. It seems like the book just assumes that he know's they're going to Vyre and shares his 5 cents
He's a pretty likely contact to speak with in order to get to Vyre, as he owes them favors, has a big boat, and is a Chelaxian navy captain who has probably vacationed there plenty of times. My players also don't have him on the council so to speak and still went to him to talk to Vyre on their own volition - he's just the most obvious candidate.
Plus, like, another council member can just suggest Cassius, too.