Place it at the very start of a scene or reaction edit, before any response line, so the greeting sets up what follows. Follow it with a surprised reaction sound for a delayed reply, or with cheering when the arrival is a welcome-back moment.
このサウンドについて
A short voice clip of someone saying hello twice in quick succession, stretched into a bright, sing-song greeting that lasts just over a second. It feels cheerful, welcoming and a little playful, like an over-eager hello when someone first appears, answers a call or pops into a chat expecting a reaction.