- She was born Lee Seunghyun on March 10th 1996 in Busan
- She has 3 older siblings named: Lee Sunmi (25) & Ji-a (26) & Taemin (29)
- Her Mother is From Busan and Her father is from Seoul
- Her love for music grew when her father agreed to take her to a Beyoncè concert in 2005
- She has 1 Dog at home named Lily
- She graduated from Seoul Performing of Arts and is currently doing online studying at an infamous Western School
-She learned English through her mother because she's a Middle School English Teacher
-Ruby always loved to dance and was a Ballerina and Hip-Hop dancer for 7 years
- She sung at church as a hobby
- Even though she went to church, she claims she doesn't have a real religion-She learned Japanese through apps and Books
- She loves to cook and took Cooking Classes in Incheon and Seoul during her school days in the Summer
-Her sister, Ji-a, said that she saw an ad for A.C.Entertainment and thought that Ruby should apply. Ruby agreed after declining several times
-Ruby trained for 3 years and 4 months. That's why she's the leader
-Ruby hates Oranges because one time a worm popped out of one she was about to eat when she was 5.
-Ruby loves listening to R&B, especially Jorja Smith, Summer Walker, and Daniel Caesar
- Her stage Name is Ruby because of her natural red lips and cheeks