Place it just after a character introduction in an anime edit, then follow it with Anime Ahh for a reaction and Onii-chan Onii-chan when a familiar voice answers back, keeping Louise at the centre of the exchange.
關於此聲音
This is a short spoken clip built around the name Louise, delivered in about three and a half seconds as a single bright call that is easy to recognise at once. It feels playful and affectionate, like a friendly tease aimed at someone everyone in the room already knows, and it lands best as a quick, light-hearted nudge rather than a serious announcement.