When Ren first meets others, she is usually very shy, quiet, and reserved.  However, when she gets to know them better, she is sweet and friendly.  She does have a bit of a dark side, but only shows it when someone irritates her, the person she most often gets angry with being her pest of a childhood friend, Daisuke.  She is very humble about her abilities, but she has a passion for music, acting, and dancing, often performing in the Zuka Club's shows.  In addition to music theater, Ren enjoys reading, dressing up in cute clothes, going shopping, and spending time with her friends.

Ren has a crush on Mitsukuni "Honey" Haninozuka but she's too shy to admit it.