[Western Crossover] How to Become the Owl's Dog

You are T.

You are an orphan, a disposable tool of the Assassins' Alliance, a blade with no will of your own.

For the first eighteen years of your life, that was all you were.

Until the Assassins' Alliance fell and your leader was killed.

For the first time, you had a goal in life.

You would become Night Owl's dog.

Reader's guide:

1. A tale of a die-hard fan turned devoted lapdog (not really).

2. The protagonist has no gender, and the story includes loop resets.

3. The main text uses both second-person and third-person narration.

Theme: Having a master.