Place it as the closing beat of a short edit, right after the character walks away or the chat ends, then follow it with Mayuri Tuturu for an anime callback or JoJo To Be Continued to keep the joke running into the next scene.
About this sound
This is a short, roughly two-second spoken clip in which a soft female voice delivers the phrase 'Ara ara, sayonara' with a slow, teasing lilt. It feels playful and lightly flirtatious, like a knowing goodbye from someone who is enjoying the moment, and its gentle, drawn-out delivery makes the farewell land as a joke rather than a serious parting.