Nikka is affiliated with No.24 Squadron, an elite unit of the Suomus Air Force. As Eila Ilmatar Juutilainen is also a member of this squadron, the two are fellow squadron members.
Nikka is something of a tomboy, bearing a boyish appearance and often unladylike manner. She was once something of a delinquent, which has since eased somewhat with the influence of her close friends such as Eila and Hanna Wind. She possesses a very exacting personality which usually splits any situation into right or wrong. While not stupid, she is relatively guileless and often distracted, making her a popular subject for Eila's pranks.
Nikka is based on the Finnish flying ace Nils Katajainen (http://en.wikipedia.org/wiki/Nils_Katajainen ). Like Nikka, Nils had a reputation for frequently crashing his craft, often surviving with only minor injuries. Her nickname, "Nipa," was also Nils' nickname during the war.