Looking for opinions on a new story.

Okay, I've started my first MLP story ever with an OC. Now, when I was writing solely for myself in the past (stories that have never been shown to anyone else), I know that a lot of my main characters were self-inserts and basically Mary Sues. But I want to write a decent OC this time around. I know in the very least that none of the OCs in my new story are self-inserts, but I need an opinion on whether or not the main character, Sickleswich, is too special or sue-ish.

I've written a prologue and one chapter, with scattered bits of a second chapter. I'm not confident enough to post it on the site yet, so here's a gdocs link.

Edit: Forgot to give a summary. It's about a batpony assassin working for the solar guard.

01 - Prologue

02 - Enter Sickleswich

I would really like it if anyone interested would PM me directly.

Thanks!