Genma Saotome
Well what to say about Genma is a big fat panda and a retard  with a napkin on his head and to what end this prevails I do not know?
Genma Saotome is Ranma's father who took  him when he was a lad from his home in Japan to the Jusenkyo springs in China.  Ignoring the Jusenkyo Guide's warnings (not that he knew any Chinese), Genma and Ranma fought atop the poles.  In the sparring match, Genma fell in the Spring Of Drowned Panda, Shonmaonichuan.  And now, due to the Jusenkyo curse, Genma transforms into a panda when splashed with cold water, and changes back when splashed with hot water.
Genma + cold water = 
 Genma (panda) + hot water =
                Genma is a thief, a bandit, a slob, and just about everything you wish you weren't.  His life on the road with his son eventually gave him a mean attitude, and he and Ranma fight every morning (about 12 feet in the air).  As a panda, he usually just sits around watching TV, and speaks through words he writes on signs because pandas can't talk.
                Genma and Soun Tendo have known each other since they were boys training under Happosai, when they promised to wed their children to carry on their school.  He is an excellent martial artist, and, despite his appearance, even more so than Ranma.  He often lectures Ranma on his actions towards Akane and sometimes beats him up about it.  However, he chooses to let Ranma or somebody else convienient at the time fight his battles.

Back to the Don...Come on, Boy!!!