It was true: so long as Kitty was in contact with some surface through which she could transmit the magic or however she was doing this, there was nothing that Ryuuko's highly limited skillset could do to counter the explosions. What she did have was an assuredly better reaction time and enough observational ability to recognise that if the explosions were being set off to specifically block her, rather than just firing off with far more risk of danger, then Kitty had to be watching her movements.

An observation that would be blocked for just enough time after a previous explosion to get in close. That was Ryuuko's hope, otherwise this could go far more wrong than anticipated.

The purple-haired apprentice took up her stance again and moved forwards nearly silently in comparison to the sounds of Toshiko and Bunny's fight or the explosions themselves. She took the inevitable explosion gracefully, reinforcing primarily her legs to land and recover--then dashed forwards as soon and fast as able, despite the head and risk of burns. If she could get through then her blade would find a nice spot on the blonde's neck...

And it would be over.