Cecilia Immergreen (セシリア・イマーグリーン) is a female English-speaking Virtual YouTuber associated with hololive, debuting in 2024 as part of "hololive English -Justice-" the branch's fourth generation alongside Elizabeth Rose Bloodflame, Gigi Murin, and Raora Panthera.
Her unit's name was changed to "hololive -Justice-" after every branch was merged into hololive in September 2026.

Cecilia Immergreen is an Ancient Automaton, with a penchant for flowers, tea, and creating music.
Crafted during ancient times, Cecilia was originally made to be dedicated to eternal servitude. Yet in recent times, she began slacking off on her work, lazily cooking mostly potatoes along with whatever else she found in the kitchen. She has now all but abandoned her duties, doing the bare minimum and mostly immersing herself in her various crafty hobbies.
With newfound interests in life, she takes on every new experience with the pure curiosity of a young girl.