What would happen if an esper went rouge and now it was on Mithril to keep Harhui Suzumiya safe? OC's Included for plot purpose

It's time for WHACKING LESSONS! This is actually a crossover between FMP, The Melancholy of Haruhi Suzumiya, Clannad, and Gundam Wing. What's next? Screaming, Dictionary throwing, even queen acting lessons! Coming right up!