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I see... so it turns out I wasted my time gaining reputation for Tears? Because I've already reached the first level in Blood. But every time I visit the library or arena, I'm given a choice between defense or attack, and they are linked to the paths. So, if I need defense, I automatically get Tears as a bonus. And if I need Blood, it turns out that my attack is already developed at the moment, and it wouldn't hurt to increase my defense, but... unfortunately... I need Blood... It's not very convenient...