George Smith is Kevin Smith's father.
George has a waving blonde hair and upright eyebrows
He is very violent and proud the time he was teaching tennis, it is shown that somehow he suffered for great insecurities and an ego breakdown after he was defeated by Echizen Nanjirou which was shown he was always drunk.
When the George was teaching some young kids how to play tennis he took the lesson too far by using Spartan methods. Rinko interviened but she also got pummeled with tennis balls several times. Nanjiro took it upon himself to defeat him. It wasn't much a challenge. He didn't even have to open his eyes to beat him.
In the current time and only in the anime, he is known to be a drunk and abusive towards Kevin.