Lille Barro's Vollstandig transformation is called Jilliel, making him a powerful Quincy. His appearance is inspired by biblically accurate angels, reflecting his sinister and god-like nature.

In episode 37 of Bleach Thousand Year Blood War, the deadly battle with Sternritter X - Lille Barro continues as he survives the effects of Shunsui Kyoraku's Bankai: Katen Kyokotsu Karamatsu Shinjuu.