Tsunami is the assistant of The Shiner but is also known as a laughing stock and the whipping boy of Windy and his acolytes. He has been the assistant of The Shiner for years now though his worth is of unknown value. When Windy wanted to get at Shiner Tsunami was easily despatched out of the way such as when Windy turned Tsunami into a giant coin.
Tsunami isn't totally useless though, he has occasionally given Shiner some advice. Well at least once anyway, we think. Tsunami was replaced secretly by HCS agent Slayer at some stage who tried to destabilise the DDS. Tsunami was assumed dead but he was discovered locked in his wardrobe in his quarters where he had been banging his head on the wall for 2 years trying to attract attention.