[Koito's](https://anilist.co/character/183155) younger sister, elementary school student

She is a professional-level cook

Takamimi Shrine has an unusual resident – Elda, an ancient elf who’s obsessed with video games! The shrine’s teenage attendant, Koito Koganei, keeps this reclusive otaku well supplied with energy drinks and junk food. Even though she loves 100%-ing her games, Elda has duties to attend to, and Koganei is bound and determined to make this otaku elf fulfill them! It’ll just take an offering or two to bribe—um, we mean convince Elda to put down her new game…
<br><br>
(Source: HIDIVE) 

Koganei Koito is a teenager who works as an attendant to the Takamimi Shrine. Rumors have it that a deity dwells within the shrine, but the actual resident is an immortal elf who found herself stuck on Earth some four hundred years ago. What’s more, the elf is a total shut-in who won’t go outside…and has developed a taste for video games! Now the attendants at the shrine have to cater to the elf’s love of the most modern gizmos–from handheld games to virtual reality headsets–in this charming fantasy comedy!
<br><br>
(Source: Seven Seas Entertainment) 

Koyuzu Koganei