What do the roman gods do?

They're all the same, so Mercury would be god of thieves, travellers, and be messenger of the gods still. The only different is that Mars (Ares) is also to god of agriculture and fertility but still he is the god of war and he isn't as scary to the Romans as Ares is to the Greeks! Dionysus is still the god of wine so he probably wants to drink but Jupiter probably won't let him. ;)