Nikka Edvardine "Nipa" Katajainen

About

Nikka Edvardine Katajainen is based on Finnish ace Nils Katajainen. She is attached to No.24 Squadron, an elite unit of the Suomus Air Force, and is a fellow squadron member of Eila Ilmatar Juutilainen.

(Source: Strike Witches Wikia)