With names like Yum-Yum and Nanki-Poo it’s hard to take New Zealand Opera’s The Mikado seriously. But while they are having fun, leading lovers Amelia Berry – as Yum-Yum - and Jonathan Abernethy – as her suitor Nanki-Poo - take their roles very seriously on stage. The Gilbert and Sullivan opera, directed by Stuart Maunder, opened this week to favourable reviews.