Akari finds herself in a strange void and is sent back in time to Hisui by Arceus, who tasks her with seeking out all Pokémon and transforms her smartphone into the Arc Phone. A stranger to the land and wearing odd clothes, she meets Professor Laventon who invites her to join the Galaxy Team Survey Corps of Jubilife Village as a way of obtaining food and shelter. The Survey Corps also wish to fill out the Pokédex, and so, after proving herself worthy, Akari is admitted into their ranks.
As part of her duties, she is commanded by Kamado to seek out the recently frenzied Noble Pokémon and quell their frenzy. After all of them are quelled, the rift in the sky that caused the frenzies expands even further. As such, Commander Kamado banishes Akari from Jubilife Village on suspicion. She meets with Cogita and the merchant Volo, and with their guidance seeks out the lake guardians to obtain the Red Chain. While the Chain fails to work as planned, Akari is still able to catch both Dialga and Palkia, one of which is caught with the Origin Ball crafted from the Red Chain, causing the rift to disappear.
Afterwards, Akari collects the Plates with Volo and Cogita's help. Once 17 of the 18 Plates have been collected, Akari meets with Volo atop Mount Coronet, where it is revealed that Volo's consorting with Giratina was the cause of the rift. He attacks Akari in an attempt to take the Plates for himself. After being defeated, he gives Akari the final Plate, the Spooky Plate, allowing her to obtain the Azure Flute.
Once Akari has completed the Pokédex, she returns to the summit of Mount Coronet and plays the Azure Flute, revealing a glowing stairway that leads her to the Hall of Origin, where Arceus challenges her. After being defeated, Arceus grants Akari a fragment of itself and the Legend Plate.
As a non-playable character
Akari works as Professor Laventon's assistant, helping to teach the player how to catch Pokémon and how crafting works. Each time the player completes a mission, she joins the Professor and the player for some potato mochi. During the game's climax, she assists the Professor in crafting the Origin Ball.
Akari's Pokémon Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.
As the player, while taking her in as a member of the Galaxy Team's Survey Corps, Cyllene guesses that Akari is "15 or so".
From 윤 (潤) yun (shine) or 윤슬 yunseul (sparkling ripples)
小照 Xiǎo Zhào
From 照 zhào / jiu (shine)
小照 Síu Jiu
Transcription of her English name
↑Akari: "I thought I’d send a photo of me and my Pokémon to my parents, just to show them that I’m all right. <Player>, why don’t you join us? I’d like to boast to them about my Survey Corps protégé! "
↑Cyllene: "Hmm. You look to be 15 or so. Quite old enough to work for your keep." (Emphasis added.)