Ryouga Hibiki is sometimes refered to as the eternally lost boy. He has absolutly no sense of direction.  He really hates Ranma and attacks him all the time.  Ryouga followed Ranma and Genma to China, where he was pushed off the cliff into the spring of drowned pig.  Now he turns into a pig when doused by cold water.  The pig form of Ryouga was adopted by Akane. Akane named him P Chan meaning little pig.  Ryouga is deeply in love with Akane but is to shy to tell her.