Soundless Voice is made as an headcanon "character song" for Ciel Phantomhive. Some people also call it "Ciel" which refers to the French word, meaning sky/ heaven.
The cover which is used for Ciel is sung by Valshe.
It's officially a VOCALOID song made for Kagamine Len by Hitoshizuku-P and Yama△.
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Kuroshitsuji/ Black Butler songs
General FictionHere are (probably) all Kuroshitsuji/ Black Butler openings, endings, character songs, OSTs and CDs. There will also be the character songs that are made as a headcanon by most of the fandom. Btw, sorry if there are English grammar/ spelling mistak...
