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It seems that the Ego Weapons regained the ability to float by themselves, it was a pretty nice thing. Now I don't have to waste MP into making them fly and they can control themselves even better. Aquamarine was already able to move alone by turning into water or a tiger, but now the other two can do the same and even fly. Things are finally looking better for my poor Caterpillar life. But now, there's more than that to do. They might be able to fly and turn into elements, but that's not all they got in terms of skills, all three of them received a substantial boost to their powers after all!
Check "The Protagonist's Sister Is Actually the Strongest"!