Cai is apart of the China line and spends most of her time with them.

At the moment, Renjun teaches her korean

When they were trainees up until the My First and last comeback, Cai shared a room with Chenle but then got her own room, and then not long after became roommates with WinWin

Much like her oppa WinWin, she doesn't get many lines in the songs as her Korean still isn't very good but doesn't mind as she thinks of it as a way to just try harder in her studies

She often does dancing with Jisung as they're the best dancers in Dream

Cai has a calm personality and doesn't speak much but she is very bubbly and has a colourful personality that is much loved by the members

When EXO were performing Lotto on one of their encore stages and let NCT Dream up with them, EXO Kai hung around with NCT Cai because he'd heard how much of a fan she is of him which didn't go unnoticed by the fandom

Cai loves practicing other groups routines to popular songs, and often does with Haechan as they both enjoy it a lot

The members often when asked about Cai, the first thing they say is that she's quiet and it's like talking to a wall as a joke, well, the Dreamie's say it, not the older members

Cai has an obsession with anything chocolate related

Cai also has the cleanest bedroom out of all of NCT, she's not once had it messy

Back at home, Cai has a pet kitten that's white and named Yin, and a black kitten named Yang

When they were still doing SM ROOKIES, Cai once said she has the up most respect for all Chinese artists that decided to commit to a group in a foreign country with a language they don't even know and she always will

Cai is only taller than Renjun

Her grandparents were the ones that raised her and is are big part of her life

Cai's mother died giving birth to her, and when she was three, her father died of a heart attack during work so she doesn't really remember them much