Lilium
Lilium is the hymn-like introductory theme for the anime Elfen Lied, where it functions as a significant plot point as well as the anime's and Lucy's leitmotif. Lilium is a significant portion of Elfen Lied, with verses based on the Epistle of James and the Psalms (36:30), as well as the Renaissance hymn "Ave Mundi Spes Maria" performed in Latin. Kumiko Noma delivers the intro as well as the entire rendition.
MOKA is a two-member musical group composed of Kondo Yukio and Kayo Konishi. They wrote Lilium. Both collaborated on the arrangement and composition of the lyrics.
The animation director Mamoru Kanbe delivered a single requirement of MOKA: that the opening song be religious music. This was the impetus for MOKA to choose lyrics from Biblical scriptures and other religious sources. Kayo Konishi explains why MOKA desired Latin poems in the following manner. While she was a student at a missionary, she sang songs in Latin and enjoyed the language's sounds. As a result, she envisioned the opening tune, "Lilium," as a modern Gregorian hymn.
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Anime: Elfen Lied
Youtube views: 3.8 million
Listen to it here: https://youtu.be/f3KzmVblyHw