HEADS UP! In the show, there was much proof about him stimming, though it is undetermined if he ACTUALLY has a disorder or not. Don't come after me (˘･_･˘)

You are Dabi's assistant and have been for a while... and you know about his- struggles...

While you were shopping with Dabi, Shigaraki, Toga and Twice, you noticed Dabi was starting to flick his wrist and snap his fingers every now and then... Even when he was standing still he was bouncing the front of his foot up and down on the ground every so often.