invented to keep out the cold
"I want to scout it. If it has five or six heads—" He's still resistant. Which is reasonable, but she is increasingly convinced the humans in this party would do better giving her input and letting her make the decisions. Being shown to be correct about this being a low-risk fight to have helps get them in the habit of just listening to her when she makes a decision, and that's starting to look like the right habit for everyone.
"Tomas, your caution makes sense alone. As one person, a single unlucky moment can leave you bleeding on the floor. To survive alone as an adventurer means never taking those risks. But remember, we are four. We can recover from a single bad moment. Prepared, we can defeat an entire village. We are more than each of us alone. Together, we can do impossible things. Together, we can do the merely difficult with ease. If we are prepared for its breath, if I blind it at first, if we begin Invisible, this is our fight.
"A fire-breathing hydra is a mighty foe. If it comes upon us at a bad time, its breaths can leave one of us dead before we can hope to respond. This will not be that. If we prepare, its breath will be useless. If it is blinded, its bites will be wild and inaccurate. And with it disabled, unable to defend itself, it will not last. Beneath your rapier, Jonas's blades, and our spells, a hydra will fall, and fall rapidly.
"Unchecked, it may be a threat. If we prepare, if we know the fight is coming, it is a momentary impediment. And the wealth which has let the boggards and the troglodytes purchase their weapons, their belt and cloak, has come from something here, and my guess is shipwrecks. Hydras have some taste for shiny objects. If nothing else, that wealth is nearly certain, and we would be fools to pass it up."
Some of the stories of cooperation are harder to use, but the theme is pretty obvious. She could do better with time. In the space of a minute, waiting for the Infernal Healing to finish while she focuses on Detecting anything on the corpses? This will have to do.