[Richard's reaction is more instinct than anything else-- he takes that yelp to be a cry of pain rather than surprise and thus immediately calls up Sona's power to launch a small wave of water at Isamu with the intent of dousing that flame before it can cause him further harm.
Of course, it's a little too big to be all that precise, so Isamu's hand won't be the only thing getting soaked here...]
[action]
Of course, it's a little too big to be all that precise, so Isamu's hand won't be the only thing getting soaked here...]