Cossette Akira is one of the playable characters in the single player mode from One Must Fall: 2097 and an opponent in the tournament mode. Fifteen years ago, a sport called The Arena was the most popular event of the day. Similar to HAR's, The Arena placed humans into a robot frame, usually ten or fifteen meters in height. The Arena players used various controls to fight their opponents while the crowd looked on. Cossette fought in The Arena until a tragic accident left her crippled from the waist down. Now she enjoys the feeling the HAR gives her, and her success in designing two space stations has given her the possibility of Ganymede. Cossette also was instrumental in the design of Electra, a robot designed from an electromagnetic crystal found on Venus.