Here She Is, the Saint in Japan.

"As long as I can live in peace, this isn't so bad." Summoned from another world, the saint is living a peaceful and uneventful life in Japan! Rei, whose real name is Alexandria, doesn't know why she was summoned. Now, she's living quietly, concealing her powers as she works for a small company as an ordinary person. As she tries to enjoy her life, small ripples from her magic start to make big waves! An enchanting story of a powerful sorcerer living her not-so-ordinary life in Japan! (Source: MangaPlaza)