Rogue/Ninja Starting Class?

[ZReport]

snip

This is Yugiri's dialogue with the Shady Guy:

Shady Guy: Ah, and you must be the Far Easterner what Merlwyb says wants to train with us. Welcome to Limsa, milady!
Yugiri: I am Yugiri of Doma. 'Tis an honor to make your acquaintance.
Yugiri: I must confess, when first I learned of your organization, I had certain...preconceptions as to the nature of your membership. It would seem I was mistaken.
Shady Guy: You're not the first person to say that, lass. Limsa's a city of pirates, to be sure, and pirates don't give two farts about keepin' a spotless reputation. They hardly need a secret society to do their dirty work.
Shady Guy: Might be as my people and I keep to the shadows, but we've got nothin' to be ashamed of. It's simply better for business that we remain unseen.
Yugiri: And so you have developed fighting techniques suited to this purpose. I see. Know that the practitioners of my art, too, are denizens of shadow. 'Tis in stealth that our strength lies. There is much we might learn from one another, I think.
Shady Guy: Then what in the seven hells are we waitin' for? If you'd come with us, Yugerry of Do-whatsit, we can get acquainted in more private surrounds... Hah, that didn't come out right, did it!?
Yugiri: <Player>. I shall remain with these people for a time, that I might study their ways.
Yugiri: Though I am loath to be separated from my countrymen, I take solace in the knowledge that they are in the best of hands.
Yugiri: You have been a true friend to us Domans. No words would suffice to express my gratitude.
Yugiri: Ere long, I hope to begin imparting my martial knowledge to the people of Eorzea. When that time comes, it would be my honor to welcome you as a student.

She made it pretty clear that:

1) She seeks to teach the people of Eorzea the way of the Ninja after training and learning from the Rogue Guild.

and

2) There are other practitioners of her art in existence.

It's not a dead art, and she may very well delegate some of the Ninja training to her associates. It makes absolutely no sense at all for Yugiri to be around before the 2.2 storyline if you are a new player. The player character doesn't know of her existence or the fact that Ninja exist. You can make the argument for Rogue however, as it is an art that was refined in Limsa Lominsa.