Who was that marked man?

The Lemon Lemming sits grimly in the cockpit of Dr Stanislaw’s monstrous seaplane and thinks back to what had just occurred...
Everything had happened so fast. Too fast.
The paddle steamer. The Iron clad. The Lama under attack. The leap. The multiplying white ninjas.
Ultimately everything had, sort of, worked out and they’d even saved (most of) the Lama they’d been sent to rescue.
But who was that old, but incredibly agile, leader of the white ninjas?
And more importantly, how had he known so much about him and his associates?
Somehow, he was able to use psychology against him!
He’d tricked him into abandoning the Lama to save the young English girl instead.
One thing was certain though; if they meet again, he’ll kill that inscrutable Chinaman before he can slip away.