Tae Grenny

Raised as an orphan by the Serpentis Clan by Tao Ching Huo, Tae Grenny found a life of toil and degradation. Knowing all that time that he was a slave from someone who killed is family pushed his resolve to find a way to make Huo pay.
Eventually Grenny disciplined hmself to ignore the seething hatred by constantly formulating his plan. Constantly changing and modifying it until there was only a very slim chance of failure. I do not say this lightly since it was a plan formed for over a span of 13 years.
The more time that passed, Huo had become to mistakenly believe that Grenny's so called complacency and acceptance was because he feared him and had given up any hope of a life besides servitude. He also mistakenly believed that Grenny had forgoten what he did to his parents, brother and sister while they were on holiday.
Some time half way past Tae Grenny's birthday, he had the chance to get his revenge on Tao Ching Huo and those Serpentis bastards and their pirating ways.