For the most part, Mr. Jameson is a jovial man who takes the work of his employees to an earnest degree. He is usually seen with a smile on his face and in a bright, happy atmosphere. However, he can be strict when it comes to having unwelcome visitors at his hotel's pool, which is only reserved for guests. Overall, he is nice and compliments people on their hard work. Despite being a businessman, he is very friendly but always keeps his nose on any potential money-making businesses. He also seems to be a fairly good father, as he and Keoni get along just fine.
Mr. Jameson appears in a few episodes, including "Cannonball", "Nosy", "Melty", "Babyfier", and "Drowsy". He is mentioned in certain episodes by Nani when she begins working under Mr. Jameson as a rental person.
In "Babyfier", he was a victim of Babyfier's de-aging powder, but was changed back to normal along with the rest of the babyfied adults.
Like his son Keoni, Mr. Jameson has tan skin, but has brown combed hair instead of red, and is usually seen wearing a pink shirt. He also has a lean and muscular build.