The Saint's Magic Power Is Omnipotent (Manga) Series by Fujiazuki, Yuka Tachibana, 橘由華

Living the workaholic life in her mid-20s, Sei never expected she'd be summoned to another world, let alone obtain the power of a living Saint. And she especially didn't expect to be totally ignored by the locals! While the kingdom desperately needs a hero, it turns out Sei was just the backup option. Left alone, she explores her newfound powers at the royal Research Institute, unraveling the mysteries of magic potions... moreLiving the workaholic life in her mid-20s, Sei never expected she'd be summoned to another world, let alone obtain the power of a living Saint. And she especially didn't expect to be totally ignored by the locals! While the kingdom desperately needs a hero, it turns out Sei was just the backup option. Left alone, she explores her newfound powers at the royal Research Institute, unraveling the mysteries of magic potions. As she helps the sick and the dying, her talents reveal themselves: might Sei be the Saint this world needs after all? less

Sei was summoned to a world in desperate need of a hero: a Holy Saint who could purify all evil. Unfortunately, she didn't quite make the grade as a Saint, but her talent for making potions has saved a lot of lives, not least of all that of a dashing, handsome knight-captain... moreSei was summoned to a world in desperate need of a hero: a Holy Saint who could purify all evil. Unfortunately, she didn't quite make the grade as a Saint, but her talent for making potions has saved a lot of lives, not least of all that of a dashing, handsome knight-captain. Much to Sei's surprise, the supposedly frigid Winter Knight proves quite warm, and now the two have suddenly found themselves out on a date! With skills like hers, it won't be long before she's exploring all kinds of new magical frontiers. less

The land of Salutania needed a savior, but Sei didn't get chosen for the job. Stranded in an unfamiliar world, she wound up finding all kinds of ways to keep busy: potion-making, enchanting, and accidentally romancing a handsome knight! Deep down, though, Sei always knew she had the power of a Saint. When she reveals that power by regenerating a wounded man's missing arm, will her peaceful days be over for good?

On Earth, Sei was a twenty-something workaholic office worker, but in her new home of Salutania she's become the Holy Saint destined to save the world from darkness. Together with the handsome Captain Hawke and the magic-obsessed Magus Drewes, she's traveled to the far-off Klausner territory to try and purify the miasma plaguing their once-fertile land... moreOn Earth, Sei was a twenty-something workaholic office worker, but in her new home of Salutania she's become the Holy Saint destined to save the world from darkness. Together with the handsome Captain Hawke and the magic-obsessed Magus Drewes, she's traveled to the far-off Klausner territory to try and purify the miasma plaguing their once-fertile land. Their first journey into the cursed wood was foiled by a pack of deadly slime monsters, but with reinforcements from the royal capital, they're prepared to return and make good on their quest. less

Having returned to the royal capital from the Klausner Domain, Sei resumes her busy schedule subjugating monsters, and it isn't long before all the black swamps in the country have been purified and the number of monsters has declined. Sei is looking forward to a breather, but then it's announced that her formal debut as the Saint will be at the start of the social season--on the same day as the ball hosted by the royal family!