Artemisia of Caria is an ancient ruler from the west region of Asia Minor, who served as queen after the death of her husband, Lygdamis, continuing his legacy. She became an advisor to Xerxes, the Persian Lord at the time and formed an alliance with him in a war with the Greeks. She is famous for her participation in the Battle of Salamis, where she survived being captured by sinking her own ship and therefore formed an escape route. Then she came back to Xerxes and convinced him to retreat. Nevertheless, the Persians were astonished by her battle tactic and praised her to be a valiant ally.
There is also another ruler with the same name, who built the Mausoleum of Maussollos.
Artemisia of the Empress Arcana is the ultimate Persona of Mitsuru Kirijo that evolves from her initial PersonaPenthesilea after Yukari Takeba helps her gain a new will to fight and overcome the grief from the loss of her father. Artemisia's appearance is that of a woman with her face half covered, wearing a combination of dress and armor and also wielding a whip as a weapon. She inherits the same stats from her initial form and still retains the previous skills, along with retaining some design aspects of Penthesilea (notably the breastplate armor). Eventually she learns some new and more powerful Ice related spells and can nullify ice attacks instead of just being resistant to them, but she's still weak against Fire attacks.
The Answer
When fought as an opponent, Artemisia has the following unique moves:
Artemisia once again returns as Mitsuru Kirijo's Persona. She uses Bufu skills. It is revealed that even when Penthesilea transformed into Artemisia, she never lost her support capabilities, though it remains inferior to that of Juno or Himiko's and still requires special equipment. But despite its limitations, Artemisia's supportive skills proved useful during the tournament, where she served as a means of communication between Mitsuru and the other characters while Fuuka was yet to arrive in Inaba and Rise is unable to use hers. Artemisia can now use Niflheim as her Instant Kill.
Intensely raise damage when striking an enemy's weakness.
Evolution
Assault Shot
28 HP
Medium Phys attack that pierces to the back row. (1 enemy) Stronger in Boost.
30
Makajam
8 SP
Medium chance of Magic Bind. (1 row)
35
Mabufula
36 SP
Medium Ice attack. (All enemies)
40
Mind Charge
22 SP
Triple magic attack for next hit. Lasts 3 turns. (Self)
44
Disarm
8 SP
Medium chance of Strength Bind. (1 row)
47
Bufudyne
32 SP
Heavy Ice attack. (1 enemy)
51
Salome's Kiss
42 SP
High chance of Magic/Strength/Agility Bind. (1 enemy)
60
Bind Arts+
Passive
Greatly raise chance of causing Binds.
63
Mabufudyne
52 SP
Heavy Ice attack. (All enemies)
67
Gallery
Concept artwork of Artemisia
Artemisia appears in Persona 3 Manga
Artemisia as she appears in Persona 3 The Movie
Artemisia with Kami-Nami and Isis in Persona 3 The Movie
Concept artwork for P4 Arena
Artemisia sprite
Artemisia as she appears in Persona 4 Arena Manga
Artemisia as she appears in Persona Q: Shadow of the Labyrinth
Trivia
Unlike most Personas in the series who are based on myths and legends, Artemisia, along with Lucia and Caesar, are a few examples of those based on historical figures.
Further more, while Lucia is a Catholic saint and Caesar was treated as a god, Artemisia was not believed to be supernatural.
Even though there was never any statement of which of the two origins serves as the main concept for her creation in the game, the one never participated in any historical battle.