For close combat that could work, but you'd also need to train your muscles and body to be able to wield it effectively. I feel like staying back in a ranged position would be better for you to start with... But you do need something to handle anything that comes close range, too...

[He'll hum a bit as he considers the options, considering both Kotori's personality and physique.]

Maybe a staff instead...?

Too bad your Essence didn't grant you any spellcasting powers.