Zelda and Sheik (The Legend Of Zelda)

Princess Zelda is the Princess Of Hyrule while Sheik is a Sheika warrior and Zelda's alter-ego.

Zelda

 * 1) She is usually never playable in her Game appearances. Plus, she doesn't have any fighting skills. All she does in Ocarina Of Time is use her magic to open cells, stun Ganon with her magic and summon the Six Sages and later in Twilight Princess, she shoots Ganondorf with Light Arrows.
 * 2) The spells she uses in Smash (Nayru's Love, Din's Fire and Farore's Wind) were only used by Link, not her.
 * 3) Just like Peach, Zelda's often a Damsel In Distress Character.

Sheik

 * 1) Sheik only appears in one Zelda game (Ocarina Of Time), making her an obscure Character.
 * 2) In the said Game, she barely did anything except play on her harp to teach Link special songs and vanish with a Deku Nut.
 * 3) Sheik is merely an alter-ego of Zelda, which was a plot twist in the Game.

Redeeming Qualities

 * 1) They're at least Nintendo Characters.