At first, when Likulau and Leopard Cat appeared before him and asked for his help, Liao wanted to get rid of them. He cares for others so much that he often thinks that he himself is selfish even though the problem he's trying to solve isn't even his own at the moment. He is also shown to be very loyal and caring. He says himself that he rarely ever goes out and prefers to just stay in his room, doing his stuff. Despite the fact that he has moved into Taipei for quite a reasonable amount of time now, he knows no ways of going to places.
His friends, Shu-Chi Yan for example, have this similar haircut, presumably because of the trending Chinese hairstyle for young men around his age. Liao appears with short, chunky, bushy hair that is slightly spiky, similar to many other characters with a youthful look. While dancing, his clothing choices become slightly more sporty-looking, often seen wearing a black sleeveless T-shirt with a purple paw and big "SKYT" as logo on the middle in the front, a purple headband, a black belt with "Nekojishi" in silver on the belt plate, and a pair of purple shorts. He's never illustrated in that many outfits. Liao likes to wear normal everyday clothes such as white T-shirts, light blue unbuttoned shirts with rolled-up sleeves, along with pants, khakis, and jeans. All that is known about him is his short height and slightly muscular build he acquires from dancing. In Nekojishi, his eyes are never shown even in full-view portraits of himself therefore, his face remains a complete mystery.
Liao's appearance is very ambiguous, probably because he's supposed to resemble the player so he doesn't have a fixed one. With 林 being double of 木, it is considered as a gag. Liao's name is Mandarin for "double silvervine (cat powder)" (木天蓼 Mùtiānliǎo).