Ille Adams is a character from the anime Rio: Rainbow Gate!. She works as a bunny girl at the Howard Resort, a casino and hotel establishment. Ille is the younger twin sister of Elle Adams, and the two are frequently seen together while on the job. In contrast to her sister's energetic and sometimes overly boisterous personality, Ille is defined by her quiet and reserved nature. She speaks very few words and is often described as having a mute or nearly silent disposition. A distinctive trait of her communication style is that she will occasionally repeat the last word that someone else has just said.

Ille has a youthful appearance with short green hair that falls to her neck and blue eyes. Her typical work outfit includes a bunny suit with a collar, stockings, and detached sleeves, complete with bunny ears as part of her uniform. Within the story of Rio: Rainbow Gate!, she serves as a minor supporting character who adds to the atmosphere of the Howard Resort alongside her twin sister. In one notable episode, Ille and Elle encounter the ghost Misery and are attacked by her, later becoming possessed by the spirit as part of the episode's conflict. Her role primarily involves interacting with the main characters in her capacity as a resort employee. Little information is available regarding her personal motivations, any significant character development over the course of the series, or notable special abilities.