Niels Knüppeln, very close friend of Rabentriller. Such nice and joyful fella!
To be very short, they were in one aviation squadron while war. Knüppeln is a cook, not a pilot. Although, he did a lot for his comrades. Particularly, it was him who helped Rb to return to normal life after a plenty of distressing things he came through. Knüppeln was the first and only guy, who was kind to Rb. Because he's so goodhearted! Really O.o
Ten years passed after war's end, they're living in different parts of country, yet still friends.
Knüppeln (c) rudwolf
Distant from The Sky (c) rudwolf, me