While I don't know the characters or their backstories, I still think it's an intriguing story so far. Judging from the second part, maybe Lissandra won't be treated as badly?

You shouldn't sell yourself short when it comes to writing. Despite a few grammatical errors, it's pretty well written and I like your inclusion of exposition to 'set the stage', so to speak (I myself have trouble doing the same instead of, like you said, 'jumping into the juicy goodness'). My only gripe, after looking up who Lissandra is in LoL, is that her personality in your story doesn't match her intended lore. But I can chalk that up to artistic license.