Shonuff44 did a great job on my OC Transformer Splashdown. He's a Tripplechanger with helicopter and submarine Alt modes. He was originally built as a Decepticon warrior, and was sent into battle pretty much from day one until a superior, noting that his alt modes made him a good scout, and sent him on a mission to find energon. He was however betrayed by a jealous partner and left for dead on a uninhabited planet. By the time he was rescued, his Decepticon symbol was warn off so his Autobot rescuers did not know he was a Decepticon. His time among the "enemy" lead him to change sides and join the Autobot cause.
He's an OC that I created way back when I was a kid, so he didn't have much in the way of personality. I later decided that he was basically the Transformers version of a child soldier, so I based his personality on Sousuke Sagara from Full Metal Panic. This is why I asked Sho to base his head on the Arbalest from Full Metal Panic.