In the official lore of Genshin Impact, Yoimiya is a beloved figure known as the "Queen of the Summer Festival". Here is the official story of her character: Yoimiya’s Official Lore

: Yoimiya is the current owner of Naganohara Fireworks in Inazuma. She is famous for her creativity and for fulfilling special, personalized firework orders that commemorate people's most precious memories.

: Unlike some who seek a static eternity, Yoimiya believes that fireworks are "both a moment and an eternity"—fleeting objects that leave a lasting warmth in people's hearts forever.