Merlin actually pauses to consider the answer to that question. Ordinarily, he'd be perfectly content to send someone off to try to figure out how to deal with the bridge guardian on their own and enjoy the potential ensuing chaos, but it's probably not worth the risk of losing the assistance Melinoë is offering. And besides, this is a goddess he's speaking to, not just an ordinary human.

"So long as you respect her bridge and shrine, there should be no issue," he says. "And don't encourage her envy or resentment or such."

At least, he assumes it was that flaring up when she asked for an abrupt change in topic in a recent conversation. It wouldn't surprise him, given that such spirits usually owe their existence to concentrations of such emotions.