- Stage Name: Rena (레나)
- Real Name: Sekioka Rena (関岡玲奈)
- Birthdate: June 29, 1991
- Height: 164cm
- Blood Type: B
- Birthplace: Osaka, Japan
- Specialty: Dancing, playing the piano and cooking
- [2015.11.18] AndyA47 - Happy Ending (#3 Happy Ending (Japanese Ver.) (Feat. Seo Ji Ahn, Rena of D.HOLIC))
-  TBS Morning Wide Show Up
-  Girls' Love Story
-  Mix Nine
- She was a model before her debut.
- She was on variety TV shows in Japan before her debut.
- In 2002 she practiced at Avex Entertainment.
- She auditioned in the first Grand Prix Okinawa Actors School back in 1999.