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I actually found it seconds after posting this =)))
For the people wondering, the name was Kamisama no inai nichiyoubi / Sunday without god
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I watched (and think it had a manga too) an anime about this purgatory? (Honestly don't know) themed world that had a female (think blonde, long wavy hair) young girl as a MC. And I think she was looking for her father (or watched him get killed, honestly I don't remember very well). There was something about graveyards or graves as well, and I think she was accompanied by some people on her journey. The father most likely had white hair.
I remember in the first episode she watched as someone was killed. Sorry for the long, confusing description, but I thought I'll give it a shot at finding this anime despite my blurry memory of it ┗( T﹏T )┛