She is famous for looking after the animals of the forest (and also hunting them at times).
because she is a goddess
Artemis
There are several things associated with Artemis, but perhaps she is best known as the maiden goddess of the hunt.
There were several temples built to Artemis. The most famous one was in Ephesus in Asia Minor.
because she was orien's girlfriend
Artemis was a Greek goddess of wilds, cities and harbors, she did not dwell in a single place, but was a goddess continuously traveling.
As one of the twelve Olympians, yes.
Artemis's symbol was not a stag, it was a golden hind. There were only five Golden Hinds, a gift of Taygeta to Artemis; the most famous is the Cerynitian Hinds which Heracles borrowed unharmed for his Labor.
The Temple of Artemis that was once one of the seven wonders of the world, at Ephesus, is now in ruins. There are no famous temples of Artemis still standing that have been confirmed to have been built.
Yes, the Greeks built many temples honoring the goddess Artemis. The most famous one is the Temple of Artemis in Ephesus. It's one of the seven wonders of the ancient world.
There are many famous Greek Goddesses. The notable Olympians are Hera, Aphrodite, Athena, Artemis, Demeter and Hestia.
She helped Hercules. She hurt Orion. It really depends.