Atsui was the complete opposite of his cold sister Samui — hot-tempered, impulsive, and incredibly energetic. He never hesitated and preferred to rush headlong into battle, completely forgetting about support. His main weakness was unrestrained boasting: he constantly came up with "cool" phrases with his favorite word "hot" and never watched his tongue. Even knowing that one wrong word could ruin him, he could not hold back. He was genuinely proud of his fire techniques and believed that no legendary weapons were a threat to his blazing blade. At the same time, he was a loyal soldier of Kumo and rushed to his comrades' aid without hesitation. His immaturity and bravado often annoyed Samui, but he never took offense at her coldness. Despite his impulsiveness, he was not a coward and fought with full dedication. Tsui simply did not know how to act any other way than directly, and he paid for it. In captivity, he surely reproached himself for his stupidity, but his fighting spirit did not fade. After his release, he most likely continued to spread his "hot" philosophy to the masses.
