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Tomura Shigaraki is the main antagonist of My Hero Academia, the anime and manga series created by Kohei Horikoshi that began in 2014. His scratchy, laid back way of speaking made short lines easy to clip for soundboards, and this excuse became a reusable joke outside the show. Fans drop it into edits whenever a character is clearly doing something dubious but pretending there is a legitimate reason, which keeps the line circulating in anime meme communities long after the original scene.
About this sound
Shigaraki saying for scientific purposes from My Hero Academia, a calm villain line creators use for suspicious experiments and ironic anime edits.
This is Tomura Shigaraki delivering the line for scientific purposes in his low, raspy, deliberately casual voice. The delivery sounds almost bored, which makes the excuse feel even more suspicious and funny out of context. There is no dramatic music or big effect behind it, just the dry phrasing landing like a villain trying to sound reasonable. That contrast is why the clip works so well when it is dropped over anything questionable, turning a normal moment into something that suddenly feels like a creepy experiment.
