Israfel said:
Meh, I think I've seen this once or twice before, or at least something similiar. I'd prefer something more like what if, while Keitaro is wielding the Hina Blade, the dark essence withhin the sword decides to take up permanent residence in his body completely transferring itself from the sword to his body forging a new darker Keitaro from the fires of their merger. Lotta possibilities with that one.
I actually once wrote a crossoverish fic that did something similar. It was a LH/Fire Emblem crossover, but instead of the Hina Blade, Keitaro wielded the Wo Dao, the sword used by the Sword Demon, Karel.
In that AU, Keitaro ended up being accidentally bonded to the sword, and has been far from human contact for much of his life to keep the sword from giving him killing urges. Upon arriving ti Hinatasou, though, Motoko attacks him, and only Haruka's interference keeps her from getting chopped to pieces by Keitaro.
It should be noted that as long as the Wo Dao is sheathed, Keitaro is his usual bumbling self, but as soon as it's blade is even partially uncovered, he changes completely and becomes an individual without morals whoýll seek out the strongest fighter nearby and cut down anyone who gets in the way.
I never really continued it, though...