 If you liked
Fate/stay night
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 ...then you might like
07-Ghost
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Both series aren't all that alike but Fate/Stay Night has some religious themes. The music from both anime are similar to me and both also have a tinge of fantasy and magic. If you like the religious motif and magic involved, you'll like either series. While Fate/Stay Night is organized more as a game for the holy grail, 07 Ghost focuses on the journey of the main character who seeks to find the truth about his past. The main character in Fate/Stay Night also seeks to learn about his past.