Use one of the following moves to perform the corresponding special ability:

Aragorn: Hold [Strong Attack] for five seconds, then press [Weak Attack] while still holding [Strong Attack]. This will activate Powers Of The Undead for healing over time. Note: This can only can be activated once per life.
Elrond: Unknown move. Water sphere that heals and protects from projectiles.
Eowyn: Press [Weak Attack], [Jump]. She will do an invincible front flip over opponents.
Faramir: Unknown move. Energy attack can be repeated quickly for multiple hits.
Frodo: Unknown move. Does not uncloak when using melee attacks
Gandalf: Unknown move. Lightning attack will hit multiple enemies. Wider fire attack.
Gimli: Unknown move. Powerful Longbeard Pound energy attack that cannot be interrupted.
Isildur: Unknown move. Energy attacks made more powerful by flaming "ghosts" that deal extra damage.
Legolas: Hold [Weak Attack] for five seconds, then press [Jump] while still holding [Weak Attack]. He will ride on his shield.
Lurtz: Unknown move. Arrows can pierce through enemies and hit others.
Mouth Of Saruman: Unknown move. Lightning attack becomes progressively more powerful as it spreads through a group of enemies.
Nazgul: Unknown move. Power Of Nine attack can be used in combinations with other energy attacks.
Saruman: Unknown move. Lightning attack does high damage to single enemies. Powerful fire attack.
Witch King: Unknown move. Terror Quake attack that can damage an entire battlefield of enemies.
Wormtounge: Unknown move. Spawns a bomb in his hand that makes him faster, stronger, and regenerate energy quicker before it explodes after ten seconds.