He has played five tests, the last the 28-9 defeat to England at Twickenham in November.
Saints are his first overseas club and, after two years, he has become used to living in Northampton.
"I think it has taken me about two years, but it's not much different to New Zealand. For me it's the weather that gets me, and being away from my family," said Ken, who honed his skills alongside George and Tusi in Auckland.
"It definitely won't get up to 20-something degrees, but I've got used to it. The winter is always hard — nothing like this. It's good to get back to the muggy and hot weather."
Ken and George were said to be key figures in Northampton winning the Aviva Premiership last year — their swan dives when scoring tries caught the attention of not only the club's supporters, but also the English press — and both are keen to continue that success with Manu Samoa, not only on Wednesday against the All Blacks at Apia Park, but also at the World Cup which starts in September.
"As a team, we just want to show the world what we are capable of, especially on our home soil," Ken Pisi said. "It will be good to get a win, but the boys just want to show that we can compete with the best."