Ishtar is described as a "broken goddess' data" that has inhabited Fillia during the summoning of True Berserker.
Compared to the more human Ishtar manifested in Fate/Grand Order due to the influence of Rin Tohsaka, Ishtar in Fate/strange fake has her raw personality of "a horrible being who doesn't understand the human heart." The description of her character is "add Tōsaka Rin and Luviagelita Edelfelt, divided by two and subtract most of the humanity."
She is quite proud, to the point of being arrogant. She seems unconcerned with even powerful adversaries, like True Archer, and is instead simply fascinated by his abilities. Ishtar seems to be mostly friendly towards Haruri, helping and guiding her, but her reasons for helping her are unclear.
Day 0 Edit
During the summoning of True Berserker, Fillia's body is taken over by Ishtar. Ishtar manages to calm Berserker and heals its Master, Haruri Borzak, who had almost been killed by her own Servant. She forms a sort of alliance with Haruri.
Day 2 Edit
Ishtar and Haruri later arrive at the workshop of Bazdilot Cordelion, the Master of True Archer, intending to attack him. True Archer senses Ishtar's nature as a goddess, which causes him to fight her, due to his hatred of gods. She is though protected by Haruri's Berserker, who has grown into a gigantic beast. Berserker then begins to destroy the workshop and the meat processing plant around it, causing great destruction, with Ishtar giving it support with her magecraft against Archer. Their battle is, however, stopped by True Caster, who causes the ground beneath them to vanish, by tricking the world itself with his Noble Phantasm, Grand Illusion. Caster manages to convince both sides to give the battle up, restoring the ground afterward. True Archer also agrees to let Ishtar go, stating that she is not a true goddess or even an avatar of one, but simply a malediction of a goddess.
Day 3 Edit
Ishtar is later shown residing atop the flying airship that functions as the workshop of True Caster. She is summoning the Bull of Heaven, Gugalanna, to get her revenge against a "rude pair of ingrates", likely Gilgamesh, False Archer, and Enkidu, False Lancer.
Ishtar is capable of controlling the arrows shot by True Archer with just magic energy control and is able to create arrows of magical energy, which she launches towards the opponent. The magical energy around her itself is capable of blocking objects launching towards her. She also has a great level of physical ability, moving quickly through the wires and cables controlled by True Berserker.
She currently displays power on the level of a Servant or greater, but she claims to not be a Servant herself. She is able to summoning Gugalanna after taking it from her other self.
Ishtar has been part of the story since the plotting stage of the story, but Ryogo Narita wanted to wait until after the Babylon chapter of Fate/Grand Order release to properly write her. Kinoko Nasu told Narita about his plan to include Ishtar fused with Rin Tohsaka in Grand Order, so he wanted to see her in the story first. Told that Ishtar is a "a horrible being who doesn't understand the human heart," Narita was going to make her a "minor hysteric." He decided that she was a good character after seeing her, so he revised things to avoid killing her off quickly. He was "charmed by her qualities as a character", describing having "gotten fired up all over again" when leveling Ishtar in Grand Order.
- ↑ Fate/strange fake Volume 3, Prologue IX
- ↑ Fate/strange fake Volume 4, Chapter 11: "The Gods Return from Twilight"
- ↑ Fate/strange fake Volume 4, Bridge Chapter