Takahisa saw the flower, knowing fully well what it was, but didn't say a word. It wasn't just some oddly colored flower, but it was a Tantibus flower, or translated as 'nightmare flower.' He knew that if one took a sniff of the red pollen, they would be cast in a slumber filled with their worst fears and nightmares. Takahisa only had that flower to implement the pollen into his attacks, but never wanted anyone to experience it's effects.
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Kaika was tempted to jump back in, but knew her attacks didn't seem to do much to Annie.