Donovan GrandSmith

Donovan Grand Smith is Grandpa Max's old friend who appeared in the Ben 10 episode, They Lurk Below. He bears resemblance to Walter Donovan from Indiana Jones and the Last Crusade.

Backstory
Donovan was one of Max Tennyson's friends. When they were younger, Donovan gained a large sum of money. Due to this, he decided to travel the world. When he offered Max, he refused, and Donovan supposedly went on his own. Many years later, Donovan became a billionaire and started a chain of underwater hotels. He invited Max and his grand kids to come to one of his resorts. There, Max, Ben, and Gwen meet Edwin, Donovan's grandson, who he wants to take over the family business. However he seems to miss the point of family and friendship, leaving him and his granson somewhat arrogant. After everyone realizes that aliens want to take over the hotel, Donovan learns to appreciate his Edwin, and they end up on better terms. He then decides to make a hotel on the moon, and asks the Tennysons if they will be one of the first to try it. The Tennysons refuse.