When a human tries to kill the Princesses of the Sun and the Moon, along with Princess Twilight and the Element of Honesty- and fails, of course- he's taken into custody after he turns a knife on himself.

Needless to say, Celestia has a lot of questions. How did a human get into her ballroom undetected? What is a human? Why does he have such a good grasp of alchemy?

And why is he a subject of Queen Chrysalis?

Rend is your basic Changeling soldier, albeit a rather tough one. Loyal to his Monarch- Queen Chrysalis- and willing to die for her and the good of the hive.

That loyalty was tested, though, when Princess Cadence and Shining Armor blasted almost every single Changeling out of Canterlot with Love Energy.

Almost every Changeling

Rend has the misfortune to be caught between a building when the blast hits him- nearly killing him. That was bad enough. Things go from bad to terrible when he tries to feed and a Royal Guard pony intercedes.

Things go downhill from there.