Ectoplasm's Quirk allows him to shoot ectoplasm from his mouth and then use it to transform it into a clone of himself. The maximum number of clones Ectoplasm can create with his ectoplasm is 30 clones. However, if he is in a good mood, Ectoplasm could create as many as 36 clones.
Ectoplasm can also create a very large clone as well, however, by doing so it will decrease the number of clones he can create. Ectoplasm can dispel his clones by willing it.
- Forced Internment Giant Bites (強制収容ジャイアントバイツ Kyōsei Shūyō Jaianto Baitsu?): Ectoplasm shoots ectoplasm from his mouth and transforms it into a giant clone of himself. The giant Ectoplasm clone then overwhelms and traps the enemy with a huge bite. He was first seen using this against Fumikage Tokoyami and Tsuyu Asui.