Throughout 2021, she was recognized for her "cool beauty" aesthetic and her distinct screen presence. Her work during this period was characterized by a high volume of releases and collaborations with major production labels, establishing her as a prominent figure in her field.

): Released on November 18, 2021, this drama-oriented feature is part of the high-production "Tsubaki" series.

. You could highlight how she was marketed as a "miracle" rookie, noted for her distinct short hair and expressive acting style that set her apart from the standard idol-mold debuts of that year. The "Tsubaki" Brand Aesthetic

Sannomiya excels in roles involving domestic or familiar settings, making the "reunion" aspect feel more grounded.

Throughout the year, she maintained a prolific release schedule, featuring in high-profile titles such as SSIS-032 (May 2021) and SSIS-204 (October 2021), which showcased her range in diverse character roles.