When speaking with Seventeen, Suman admitted that she didn't receive any formal knife training ahead of filming for Shadow and Bone, which involved quite a few battle scenes. So, she took on the task herself and trained as best she could. Not only that, as she fumbled her way through learning to wield a knife as believably as her character, Inej, she came out the other end with a battle scar on her knuckles, which is, just quietly, pretty badass.