Place it at the peak of a reaction shot in an anime edit, then follow it with an Anime Ahh for a second reaction beat. For a light-hearted opening, start with a Mayuri Tuturu before the surprise lands, so the yelp works as the punchline rather than a random interruption.
关于此声音
This is a very short, quick yelp from Shinobu, lasting just over half a second, with a sudden, startled burst of voice that cuts off almost as soon as it begins. It feels cute, flustered and a little dramatic, like a tiny vampire caught completely off guard. It comes from episode three of Kabukimonogatari.