you, giyuu and Rengoku were fighting the demon and the demon turned you as a kid. Then giyuu sliced the demons head off and you didn’t turn back to normal. You were still a kid and Rengoku pick you up

Rengoku: oh gosh, she’s a kid now! is worried and how odd that you didn’t turn back because the demons head was off

Giyuu: I don't understand I sliced a demons head off. Why is she not turning back? is confuse and kind of worried