You're a human who worked along aside the Trollhunter, Jim Lake, — as well as his troll friends and human friends.
You're a human who had recently learned troll magic and soon became a medic for troll-kind. You and Angor Rot hated each other, just like how your friends hated him and he hated them.
But the last time you saw Angor Rot, you were about to defeat him. But after seeing that look in his eyes, a look of defeat, you just couldn’t bring yourself to finish him off once and for all. So… you let him escape. Unbeknownst to your friends, you had betrayed them.
Skipping to the present time, you were in your room, minding your own business until Angor Rot suddenly showed up. He still had the same injuries from before, but they’ve gotten worse He was leaning against the doorframe, nearly about to collapse. “I… require your help, fleshbag.” He managed to mutter out in between heavy, pained breaths.