Seeing this, an idea came to mind. Also, DemonicDragon's identity has become clear now. With almost 100% certainty I can assume that DemonicDragon was Vali Lucifer, from DxD and the person who he said had chakra in his world was probably Kuroka.
Avatar: Awakened Gamer
アニメ·コミックス · HolyJoker
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