Lyney is a skilled magician who enjoys the showlight. He is, at first sight, very easygoing and friendly compared to his siblings Lynette and Freminet, who are reserved and introverted respectively, though he is said to be much quieter when alone with his sister. He and his sister are talented magicians, having learned from Cesar in their youth when they were living on the streets. Lyney remembers all of the people that he is indebted to and will repay their kindness, as shown with Arlecchino, Cesar, Chiori and the Traveler.

Though it is not said directly, it is implied that he does have some feline traits like his sister such as his eyes, his love for fish and a wish to sleep more in the morning. His tendency to be both intimate yet reserved also gives him a mysterious aura often related to cats. His constellation also has the word "cat" in it, just like Lynette. However, these traits are not as pronounced as his sister, as he appears just like a normal person and does not share her increased senses of hearing, taste and smell.

He cares greatly for his siblings, wanting to ensure that they have a home to live in and looks out for them whenever possible, becoming extremely irrational should their safety be threatened. This is to such an extent he would even be willing to face his own "Father" in a duel, knowing he could never beat her. Despite all his cheer, Lyney has a dark and traumatic past with his sister, but they have a very good relationship, likening it to the only truth in a world full of lies and falsehoods. As a result, he is willing to do anything to stay with her. Lyney is also implied to quite prideful, wanting to prove himself to others.