Erina is good friends with Yuma Okita and Miyako Hayakawa, and the three are usually seen tagging together in flashbacks. Erina has a one-sided crush on Yuma Shindou. According to Yuma, she is kind to her friends. However, she and her group have been bullying Tamaki Minase out of jealousy due to Tamaki's relationship with Yuma. Erina is a teenager with medium-length blonde hair and brown eyes. Her hair is swept into one pigtail on the right side of her head by a scrunchie.