Gen (元, Gen?) is a character in the Street Fighter series of fighting games. One of the original 'street fighters', he returned for two games in the Street Fighter Alpha series. His restaurant is also one of the stages in Super Gem Fighter: Mini Mix (Pocket Fighter in Japan).
Gen was a master assassin and friend of Chun-Li's father; he briefly trained her in her youth. However, he was forced to kill another assassin in front of the young girl, and blamed himself for what he saw as the violent path her life had taken since then. He swore never to assassinate again, and instead settled down in Hong Kong, opening his Genhanten restaurant and continuing to perfect his fighting skills, using them on Shadaloo punks whenever possible. Gen's assassination style incorporated various Kung fu styles, such as Mantis, Crane, Bear, and Tiger. He has refined his strikes to target an adversary's vital parts to deliver quick, deadly blows. Gen entered the first World Warrior tournament alongside his friend Lee, hoping to find a worthy opponent. Dissatisfied, he returned to Hong Kong. Gen then took on the responsibility of raising Lee's nephews, Yang and Yun Lee, and trained them in martial arts.
Sometime during the tournament, Gen discovered he had developed leukemia and had to withdraw from the tournament. Not wanting to die on a death bed, he started to search for fighters to give him a "deathmatch". The only opponent Gen had ever considered to be truly worthy was Akuma. When the two fought, however, Gen withstood Akuma's most brutal technique, the Shun Goku Satsu, by emptying his own heart and mind. He then struck back with his Zan'ei shadow fist attack, but Akuma was also unaffected. After a grueling match, Akuma was in position to deliver a fatal blow, but left after discovering Gen had leukemia. Disappointed that he did not get his deathmatch, Gen went on a search to find Akuma. Once Gen tracked Akuma down, they battled once more, the results of which are unclear.
In Super Street Fighter IV, he reflected on how Chun-Li has grown into a strong and admirable woman. He knows he cannot protect her for much longer, as his time is running short. He joins the S.I.N. organized tournament, and at some point Chun-Li finds him and demands that he tell her all that he knows about what happened to her father. Gen refuses and fades away, leaving her alone. When the S.I.N. base is destroyed, Gen protects Chun-Li from the ensuing collapse, though it's not shown how. While partially trapped under the rubble, Gen witnesses Akuma and Gouken fight over an unconscious Ryu, internally referring to the two fighters as Life and Death. He muses that Death is indeed strong. Impressed by what he called their "ultimate battle" in which both men were "prepared to give up the ghost", Gen resolves not to die until "the final battle between Life and Death". He then returns to what he calls " my own fight to the death".
Gen is the only Street Fighter character that can change fighting styles in mid-fight. This gives him access to two different movesets, and knowing which is the best to use in the situation is the key to using him effectively. The Mantis Style focuses more on quick jabs and low-level, repeated damage, while his Crane style is slower but with more damaging, longer-ranged attacks. Overall, Gen excels at comboing moves together and executing 'air juggles' - moves that link together to keep the opponent off the ground.
In Street Fighter IV, if Gen loses to Gouken, Gouken says to him, "You and I hold a special understanding of the realms that await us..."
Perhaps, this means that both of them know they are destined to die before the true battle is over.