This was simply down to the fact that Yuta exuded way too much cursed energy, and now, Rika cannot be manifested fully. This also means that he cannot utilize the copied technique as he would like.

According to Gojo's analogy, cursed energy is volatile, and a jujutsu sorcerer uses it as a form of fuel, but it's extremely hard to control. This was the case with Yuta Okkotsu, who couldn't ...