"I feel the country needs someone who is fresh in office. The government is always well-manned with lots of brains and good advisors so he'll be well-informed," she said.
"I think people are afraid that he's not a well-seasoned politician but I think as a very successful businessman he'll improve the economy and he'll shake up the system and hire the right people and that's what America needs right now."
On Trump's hardline approach to border security and allegations he groped women in the past, Ms Koo said: "The whole election is so ridiculous. Everybody is attacking each other, they're picking on smaller things. I don't think he dares to belittle anybody. Period."
The grandmother of four said she very much valued the fact Hillary Clinton would be the first female president of the US if elected but she did not think the country would change for the better under the former First Lady's command.
She also commented on calls for tougher gun controls in the US, saying irresponsible gun owners needed to be targeted.
"Some kinds of vetting or background checks on gun owners are fine but it's impossible to eliminate guns because there are so many guns around.
"If there's a magic wand you can tap into and all guns disappear, then I am all for it. But the authorities never talk about responsible gun owners who are doing everthing right," she said.
At least one person was killed and three people injured after a shooting near a voting booth in California yesterday.
The newly elected President Trump addressed supporters at his New York HQ saying it was time for the country to "bind its wounds of division".
"I pledge to every citizen that I will be a president for all Americans. This is so important to me... For those who have chosen not to spport me, I am reaching out to you for guidance and help.
"Ours was not a campaign but an incredible and great movement."
Americans residing in Whangarei did not plan a post-election get-together.