User blog comment:X-Machinist-X/Dishonored random stuff/@comment-26947588-20151017034304/@comment-27038417-20151018180738

...But Orcas are actually dolph- nevermind.

It's been mentioned more than once that Billie wanted to be the captain of a ship. Her sending Daud the book on port cities also implies she has an intimate knowledge of them now.

Though if she does have a ship I do see her being either a pirate captain or a smuggler.

But yeah I think Geist is the only one who likes my idea so I'll stop.

(It could totally happen though!)