They're a descendant of a "cursed" familly. She has a clock and when she clicks on the top of it she can go back to a certain time. This clock belong to her biological familly that died in a fire. She is an orphan and met Cléo in there when she was very very young. Cléo got adopted quickly by her dads but Coralie never got adopted and now lives alone in a small appartment with their cat named... Cat. She met Laï first in middle school and helped her discover that she is trans. They got separated at the end of middle school because Laï decided to follow her dreams of being an idol. She then went to high school where she reunited with Cléo, and became friends with Mike who is Laï twin brother. She got reunited with Laï later in high school. Also they are non-binary (She/they), a lesbian and autistic !!!