The main antagonist Hao Asakura (Zeke Asakura in the English Dub) killed his parents while he was young and since then he has sought out revenge on Hao.
Lyserg is also a dowser, a person who is able to find a person or persons using his special abilities. Lyserg uses his Crystal Pendulum for dowsing and over souls. He channels his over soul into his dowsing pendulum, allowing it to become a rope dart. His method of fighting with it consists of using high speed attacks that come out too fast for his opponent to react against.
At first, Lyserg joins with Yoh Asakura and the others, but later joins the X-Laws, a group dedicated to destroying Hao. When Lyserg joins them he is unsure about the ways the X-Laws try to eliminate Hao. Though Lyserg holds great hatred for Hao, Yoh's own philosophies and personalities keep him from crossing the line. In the anime, Lyserg abandons his spirit Morphine for an angel spirit called Zeruel, but in the manga they are inseparable.
For his character, Lyserg is rather unstable when it comes to parent-child situations. He has a generally kind heart, although he becomes a bit of an anti-hero. Lyserg's dreams are to take revenge on Hao and to become a great detective much like his father. He is very passionate in his hatred for Hao, and will snap at the sight or sometimes even the mention of him. He was born on May 17, 1986.
Lyserg's Furyoku is 170,000 (as seen in chapter 276)