Billy the Kid in Eiyuu*Senki is a whimsical and energetic character inspired by the infamous Western outlaw. In this alternate universe, she is portrayed as a young, lively girl with a penchant for gunslinging and a love for adventure. As one of the many historical and mythological figures reimagined in the series, Billy brings a unique blend of charm and chaos to the team. Her role involves utilizing her sharpshooting skills in battles, providing both offensive strength and comic relief to the group's dynamic.