Lucina

Lucina is a character from the Fire Emblem series. She was confirmed to be a playable character in Super Smash Bros. for Nintendo 3DS / Wii U in the same character reveal trailer as Robin, another Fire Emblem representative. She is Chrom's future daughter that made her debut in Fire Emblem: Awakening. She has been confirmed to have the same moves as Marth, but have have slightly altered characteristics, such as shorter height and and attacks that don't concentrate at the tip of her sword. Lucina's palette swaps appear based on other female characters in Fire Emblem: Awakening.

Lucina was originally considered to be an alternative costume to Marth, much like Alph is to Captain Olimar, but ultimately, Super Smash Bros. director Masahiro Sakurai decided to make her a separate character. The reasoning for this is that he wanted some of her attacks to be significantly different to Marth's.