Ena is a pale-skinned girl with short brown hair that has hair strands swept to the left side and blue eyes.
When outdoors or camping, she wears a puffy blue coat and maroon leggings. She also wears white-and-blue ankle-warmers, grey boots, a white-and-blue scarf with grey gloves and earmuffs.
In school, she wears the typical female uniform (seifuku, 制服).
Ena got invited by The Outdoor Activities Club to some Christmas celebration and which this is her first camping in the series.
Ena usually messages her whenever she's going on a camping, and she's the reason why Rin started Group Camping by convincing her and which left her thinking about it. She often chats with Rin while she is working in the school library.
Ena got texted that Rin is going to a certain camping.
- The name Ena means "favor, benefit" (恵) (e) and "that" (那) (na).
- Ena's surname Saitō means "simultaneous" (斉) (sai) and "wisteria" (藤) (tō).
- Ena hates cold.
- Ena's birthday is on September 1.
- Ena tends to play a lot with Rin's hair, without her noticing, she changes the shape of her hair on repeated occasions, she also tends to throw crazy comments that surprise Shimaru Rin. She is always pushing Rin to be more sociable and get along with the girls at Outdoor Activities Club.
- With Chikuwa