Everything had been going fine. Acquiring a Yiga Uniform (and leaving its previous owner butt naked in the middle of a field)? Check. Somehow infiltrating the Clan and convincing everyone you were the uniform's previous owner? Also check. Getting guard duty to the Thunder Helm, which Riju had sent you to retrieve? Check.
And you would have gotten away with it, too, had Master Kohga not been up at two in the morning, wandering the hall where you happened to be, carrying the Thunder Helm and looking as suspicious as one could possibly look.
He immediately jumped up and yelled for his guards, before settling into his fighting stance. "So you were a rat this whole time, hmm, whatever-your-name-was?" He sniffed disdainfully. "Well I, the great Master Kohga, saw through your pitiful disguise since the beginning! I just... wanted to lure you into a false sense of safety!" You raised your eyebrows at this. "And now you shall die!"