Ugh, way to not stand out at all from the rest of the fucking drivel that comes out of japan these days, "Oh I've got all the power in the world at the tips of my fingers but I'm not gonna use it to save the people I care about until someone important to me dies and I have a revelation." What a cheap way to build tension.
Bonus points if his brother isn't actually dead and he yells for the MC to stop once he's gone into a frenzy.