This article contains plot details from the latest book.
Krakie, as named by Keefe Sencen, is a kraken-shaped Prattles pin, mentioned in Flashback, that is pinned to the bandage on Sophie's wrist for backup support. Krakie also has several other friends on Sophie's bandage, including Fluffy, Bitey, The Stink, and Scaley Butt.
It is a gift from Keefe Sencen to Sophie to make her feel better due to her hand being broken from an attack by the Neverseen.
Keefe and Sophie consider Krakie "ours." After hearing of Krakie and the other pins Sophie and Fitz agree Keefe has the strangest sense of humor.