The Sonohigurashi side of this crossover hits completely different from the Touhou half. The village and shrine themes open with this unsettling rural atmosphere that fans of Higurashi will recognize instantly, that creeping tension under calm surfaces.
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Reimu's theme reimagined through the Sonohigurashi lens feels darker, more grounded. Parsee getting two theme variants is a nice touch, each one leaning into jealousy and bitterness differently. Then "理性を失った振手梨火のテーマ" goes full unhinged, the kind of track that plays when a character snaps.
The character select themes keep things hype between the horror. Really unsettling stuff. If you want your fighting game music with psychological horror seasoning, this side of the soundtrack delivers.