Who is Irma Bunt from You Only Live Twice and what is their importance?

Irma Bunt is Ernst Stavro's wife and partner in crime. She is described by Tiger as extremely ugly with a flat, ugly face, dull eyes and a severe bun. She comes with Stavro to Japan as Frau Emmy Shatterhand, a botanist. In the book, she is described as dumpy. She stands beside her husband in his crimes and encourages him to consider moving to other locations to have more chances to branch out and escape public inquiries. She describes the garden as a shrine to death.