|Name||Eleonore "Leo" Kliesen|
|First Appearance||Tekken 6|
Leo Kliesen is newly added character in Tekken 6, she is an adonic female who enteres the tournament looking for answers about her parents.
Leo is the daughter of Emma Kliesen a exectutive at G Corporation and an unamed male. He father disapeared when he went on one of his explorations when Leo was still a child, leaving only her and her mother, despite her father dying while she was young she has a lot of his qualities as well. Soon after the events of Tekken 5 her mother got killed along with most of the other workers of G Corporation.
When the police told Leo that they were closing the case and will not look into it further Leo decided to take the matter into her own hands, while looking for inforation she found out about a person called Kazuya Mishima who was praised at G Corp who had sudenly raised to power after the incident involving Leo's mother. Thinking that he had some sort of connection to her mothers death and sooner realising he must have killed her.
Leo was desperate to get revenge agaist Kazuya Mishima but due to his current position at G Corporation it would be near impossible for her to get near him, until she saw that the Mishima Zaibatsu was going to hold the King of Iron Fist Tournament 6 and Kazuya will be participating in it, this was more then enough reasons for Leo to enter the tournament so she entered looking for revenge and answers.
- "Leo" is a nickname. Her real name is Eleonore Kliesen.
- When Leo was first shown, many people believed her to be a young boy. This was due to her having her breast's held back with buckels and her name being Leo, before being revealed that it's just her nickname.
- Leo's gender has been debated ever since she appeared in Tekken 6, athough, it was recently announced here that Leo is indeed female at the Tekken Blood Vengeance 3D premiere in Cologne, Germany.