Put it at the very start of a greeting edit, then follow it with a reaction sound once Hermione has been introduced, keeping the hello as the opening beat and the reaction as the payoff.
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This is a roughly one-and-a-half-second clip of a voice saying "Hello Hermione!" with the bass turned up hard, so the friendly greeting lands with a thick, rumbling weight. It feels playful and deliberately over the top, like a grand entrance for someone who has just arrived. The exaggerated low end makes a simple hello sound much bigger than expected.