Got bored, so made a moveset for her.
Neutral Special: Spear Throw: Lucina takes out a lance and throws it, can be charged. The longer it's charged for the further it goes through the air without hitting the ground, and does more damage fully charged as well. 7% damage uncharged and 13% damage fully charged. Uncharged has low knockback, fully charged has medium knockback.
Side Special: Aether: Lucina lunges forward with Falchion, then twirls around and slashes Falchion upwards. The lunge does 12% damage and heals Lucina by 6% if it connects, and the second hit does 22% damage. If used in the air, only the first hit of Aether can happen, and it gives Lucina sub-par horizontal recovery, but puts her into helpless. The lunge has no knockback, but stuns whoever it hits, and the second hit has high knockback.
Up Special: Galeforce: Removes Lucina's helpless state and gives her another second jump if she's already used it. Needs Lucina to touch the ground before it can be used again.
Down Special: Aegis/Pavise: Lucina forms a grey bubble around herself, and depending on the direction the Control Stick is moved to just after the bubble is formed, it changes colour to red or green. If the Control stick is moved upwards, the bubble turns red, and Lucina takes half knockback and half damage from physical attacks. If the control stick is left down, Lucina takes half knockback and damage from ranged attacks.
Normal
Neutral Attack - Lucina swings Falchion vertically, then horizontally, then diagonally. First hit does 5%, second does 8%, last does 12%. First two hits have low knockback, last has medium knockback
Dash Attack - While moving, Lucina slashes Falchion upwards. 8%, low knockback
Side Tilt - Lucina twirls 360 degrees while swinging Falchion diagonally. 10%, medium knockback
Up Tilt - Lucina thrusts Falchion behind her, then curves it above her head. Thurst does 7%, low knockback, curve does 11%, medium knockback
Down Tilt - Lucina kicks her leg out. 3%, low knockback
Smash
Side Smash - Lunges forward with her lance. 10% uncharged, 20% Fully charged. Medium knockback uncharged, high knockback fully charged
Up Smash - Spins her lance above her head twice. 7% uncharged, 14% fully charged. Uncharged low knockback, fully charged medium knockback
Down Smash - Puts the tip of the lance on the ground and rotates 360 degrees, rasing the lance as she spins. 7% uncharged, 14% fully charged. Low knockback uncharged, medium knockback fully charged
Other
Ledge Attack - Slashes with Falchion as she climbs on. 5%, low knockback
100% Ledge Attack - Swings lance as she climbs on. 10%, medium knockback
Face Up Floor Attack - Spins lance above her body, then gets up. 7%, low knockback
Face Down Floor Attack - Thrusts lance in front of her, then jumps gets up while spinning lance. Thrust, 7%, Spinning, 10%. Thrust has low knock back, spin has medium
Aerial Attacks
Neutral Aerial - Lucina spins three times while holding Falchion out. Each hit does 5% damage, and they all have low knockback
Back Aerial - Lucina rotates to look behind herself while slashing Falchion. 8% damage, low knockback
Forward Aerial - Lucina holds Falchion above head and slashes down. 6% damage, low knockback
Up Aerial - Lucina Arcs Falchion above her head. 10% damage, medium knockback
Down Aerial - Lucina's falls towards the ground faster, holding Falchion downward, 12% damage and medium knockback
Jumps: Lucina's jumps carry her fairly high into the air.
Taunts
Up: Yells "I say when it ends" while holding out Falchion in front of her in both hands
Side: Shouts "Hope will never die" while Falchion glows
Down: Slashes Falchion in front of herself several times
Victory Poses
Holds sword vertically in front of face while saying "You will not stop me"
Holds a glowing Falchion high in the air while saying "I challenge my fate"
Sheathes word while saying "Whatever it takes"
On-Screen Appearances
An Outrealm gate opens in the sky, and Lucina falls down from it.
Final Smash: Foreseer: An Outrealm gate opens near Lucian which she enters. Once she's gone, the lighting darkens, and purple lightning falls to hit the stage randomly for 5 seconds. After those 5 seconds, Grima will appear behind the stage and breathes Expiration over it for 15 seconds. After Expiration finishes, Grima disappears, the lighting returns to normal and an Outrealm Gate opens above the stage that Lucina falls from. The purple lightning does 10% damage and Expiration does 20% damage.