Place it at the end of a fail-to-win sequence in your edit: start with the Roblox Oof for the mistake, add a quick Nope for the failed retry, then finish on this clip as the final reaction to the turnaround.
About this sound
This is a two-second clip of Mew Mew's high-pitched, cat-like laugh from Deltarune, built around a rapid nya-ha-ha cackle in a bright anime-style voice. It feels mischievous and smug, like a character who knows she has won the exchange and wants everyone else to hear it too.