I always assumed that they don't live quite as long as true drakes, but still live far longer than most other metahumans (with the exception of elves, maybe). Being a drake would definitely add an interesting twist to the mission for your character. Not necessarily a bad twist, just an interesting, and perhaps extremely lucrative one if he plays his cards right.
Well, his current mission is trying to figure out what is happening under the waves in the Caribbean-Gulf. (formerly Gulf of Mexico)
He's been feeling inexplicably pulled towards the ocean for the past 3 years, and is now aware of some presence that is "watching" him and millions of others living on the coast.
Last mission, the runner team he's been watching and quietly training up "incidentally" lifted a powerful artifact whose name loosely translates to "The First Tear of Mother Ocean".
He had planned on using the chaos of their mission to steal the artifact himself, but the runner's planning worked better than expected, and he was able to convince them to transport it directly to his ship.
Long term plan: Use the Tear and another artifact to conduct a powerful divination to peer into the depths of the ocean basin, and see just what exactly is really down there.
(if anything; it's possible the stress of all the years of hiding and living half-cocked paranoid is finally getting to him.)
Depending on where the plot goes (I don't know yet)...there might actually be something down there to warrant mutual alarm for the CAS, Aztlan and PCC. ;p