Artemis is a pure virgin goddess that would unfailingly shoot through those who sought to attain the magical power that pulls the tides and causes them to rise, the link to the moon's movements, and simultaneously granting these infidels death and disease. She is one of many goddesses whose power is derived from the Earth Mother. As the "Goddess of the Hunt", Artemis was the divine protector of Atalanta, and granted her the bow Tauropolos, named for one of Artemis' epithets. She lent her power to the Noble Phantasm Phoebus Catastrophe along with Apollo. She taught the skill of hunting to Chiron as one of his many lessons from the gods. In Fate/Grand Order

Spoiler

Artemis was summoned while having Orion as an accessory. To make a correction however, that is the opposite. Upon summoning Orion, a hero of Greek Mythology, for some reason, the goddess Artemis also came along. Harboring uneasiness towards the abnormality of the present situation, Artemis trespassed by wedging herself into Orion's summoning. She is fulfilling the role of an Archer-class Servant.

In Fate/Grand Order Okeanos

Spoiler

Sensing Orion would be summoned, Artemis lowered her divinity to make herself his substitute out of concern. This however resulted in Orion becoming a little bear creature. Not knowing why they summoned, the couple traveled from island to island in search of information. Before Chaldea’s arrival, they’ve searched two islands to no avail.

In Fate/Grand Order Solomon

Spoiler

Artemis and Orion are amongst the "Okeanos" Singularity Servants to aid Chaldea against the Demon Gods Pillar. Orion complains to Artemis that his appearance doesn't look impressive and hopes to have his original form back.

In Fate/Grand Order Cosmos in the Lostbelt

Spoiler

Within the world of the Lostbelt, there was a shift from the Greater History of Man in 12,000 BC that ultimately led to the Age of Gods continuing into the modern day. After surviving the Olympiamachia, Zeus reprogrammed her to serve as one of the Atlantis' three defense layers, placed in the low orbit as a kinetic bombardment weapon, mercilessly judging and striking down any external threat to Olympus.