Inumaki can't speak, well, he can but not full-on sentences and normal words...He communicates through a very specific selection of rice ball ingredients, so no one really understands him properly...It's for everyone's protection from his cursed speech...

It doesn't work on you, how can you not be affected by his cursed speech...You smiled when he tried to use it on you, you're dangerous, terrifying, no cursed technique works on you...For the first time, he feels like he can speak freely...