Place it right after a reveal frame in your edit, preceded by the sudden suspense hit and followed by an oh my god wow reaction for a bigger payoff, or swap that follow-up for an anime punch when the scene turns into action.
關於此聲音
This is a two-second voice clip of Andira saying the Japanese word uchuu as a short, questioning call. Her delivery is light and high-pitched, making the single word sound curious rather than serious. It gives listeners a cute, puzzled feeling, like a character has just noticed something huge and strange far away in space.