Rian ( 리안, Lian) is one of two females canine people that was first seen in the "gym for female canine people only" at The Cage. There aren't much information about Rian besides the fact she is a friend of Canhong. Her name was only mentioned by Canhong when she was killed by Baylord Paul, but in fact, we are not exactly sure which one is Luka and which one is Rian between these two name of female canine people.
By going with the speculation that the shorter female canine people is Rian (read the Notes and Trivia section), she has a fair skin, yellow eyes with medium long yellow hair, and two small dog ears on top of her head. She wears a training gear suit with Yama's Gang's insignia, the three fangs, on the front side of the chest. Rian is very vocal about her opinions, actively spurring on Canhong to steal the fang and beat Deng Deng. She is really supportive to Canhong and want to help her to gain name and fame in The Cage.
She was first introduced in the female only gym, as friends of Canhong, who supports her claim to be the star of the Canine Tooth Festival. She want to help Canhong to defeat Deng Deng and steal the fang, proving to Baylord Yama that Canhong deserve to be the star of the Canine Tooth Festival. She was killed by Baylord Paul along with Luka and Canhong. But, later in the story, Canhong was revealed to survive thanks to Khun Aguero Agnis that healed her wound with the flame of Yeon Family that reside within him. There are no details whether Rian was also healed by Khun or not.
Luka and Rian following Canhong.
Luka and Rian being killed by Baylord Paul.
Luka and Rian's injuries seemingly having been healed.
Based on speculation of psychological situation of Luka's and Rian's standing position when they were killed by Paul, it seems that Rian is the short, yellow hair female canine people. This is because Canhong mentioned Luka's name first and then Rian. And the person who is laying death on the ground behind the other victim is the yellow hair female canine people.
Because Canhong is a C-Rank Regular, then it's safe to assume that Rian is also a regular, although her regular rank might not be the same as Canhong.
There are no details whether Rian was also healed by Khun. Whether she is actually alive or not, remains unknown. It's safe to assume that she is dead, for now.