Can some one come and explain to me who the twelfth olympian god is, im stuck between dionysus and hades. explain why they are the twelfth and how/when did they become part of the olympian council. : )

Generally, Hades is excluded from the Olympian gods because he stays most of the time in the underworld.

Dionysus should hence be the 12th god you're searching for.He's the last god that was accepted as an Olympian god.

I unfortunately don't know exactly why he was accepted as an Olympian god, but I do know that he is involved in several stories where he interacts and/or helps other Olympian gods. He also managed to rescue people from the underworld and bring them back to Olympus.

Iwould say a, due to the fact these routes display many things that would be useful and provide explanations for how states are known.