Mynah is a Night-caste Solar from the White Wolf game 'Exalted'.
Basically, Night-caste are the thieves, scouts, and assassins... Mynah's a bit of all of those, plus a dash of landbound pirate for good measure. Basically...if you took Jack Sparrow and made it so he didn't act like he was suffering a concussion all the time... you'd pretty much have Mynah.
Yes, his swords really are that big. Daiklaives follow the old RPG chestnut of being Much Too Large To Use But People Use Them Anyway.
In pairs, no less.