so where and how can i get some actual swords for ninja?

[Venur]

Rogue and Thief are synonymous. Plus it's common that Thief/Rogue upgrades to Ninja in FF games.

And they usualy don't end wearing dagger and surely not become a utility class.

Also rogue and thief aren't synonyme. A rogue could never steal anything in his whole life and remain a rogue. A rogue is someone who would do dishosnest or immorals act, be dangerous or live apart from the sociaty. A thief must be a stealer. you can,t be a thief if you never stolen anything. But a thief can be a rogue while a rogue isn't forced to be a thief.