Azura

• Preferred IV: +SPD / -HP or -RES
• Weapon: Harmonic Lance (+Spd) / Slaying Lance (+Spd)
• Assist: Sing
• Special: Moonbow / Iceberg / Luna
• Passive A: Triangle Adept / Fury
• Passive B: Wings of Mercy / Lancebreaker / Gale Dance
• Passive C: Hone Spd / Spd Tactic / Flexible
• Sacred Seal: Speed +3 / Fortify Def / Spur Spd

This Azura trades her built-in Sapphire Lance for a Harmonic Lance that not only offers her a higher Attack with bonus damage during Special activation, but is also open to forges for a permanent stat boost without the detriment of Fury. In exchange, she trades her A slot in for Triangle Adept to sustain her tankiness vs red units. 

A Slaying Lance can also be taken in lieu of the Harmonic Lance, which offers Azura shorter cooldowns on her Special charges. With Slaying Lance+Iceberg, Azura will deal 14 guaranteed additional damage, while a Harmonic Lance+Moonbow has the same charge rate and slightly more variable damage- though as long as your opponent has a Defense stat of higher than 12, Harmonic Lance+Moonbow will outdamage Slaying+Iceberg. Slaying+Luna is trickier to calculate, but essentially Slaying+Luna deals more damage if the opponent's Defense stat is over 50; otherwise Harmonic+Moonbow will still outdamage it.

Through this, Azura is capable of limited combat and can help to handle red and some blue threats to your team while also supporting your other units via Sing and Wings of Mercy. It’s generally advised to run a buff in her C slot- whether or not you also want to buff in her Seal slot or if you want to make her more combat capable is up to you.

With +SPD IV, a Speed forged Harmonic Lance, and a Sacred seal, Azura is capable of reaching a speed of 42. This allows her to dodge most doubles in the game, as well as giving her far more capability to double her opponent - and if she doubles, she will proc Moonbow as her Special with Harmonic Lance's bonus damage added in.

• Preferred IV: +SPD or +ATK / -HP
• Weapon: Sapphire Lance
• Assist: Sing
• Special: Moonbow / Luna
• Passive A: Fury
• Passive B: Wings of Mercy / Gale Dance / Geyser Dance
• Passive C: Hone Atk / Hone Spd / Breath of Life
• Sacred Seal: Fortify Def / Hone Spd / Breath of Life / Flexible

A far more supportive Azura, this build focuses predominantly on her supportive capabilities.  With a Sapphire Lance, Azura naturally counters many red units, though she should not engage in more than one combat per round- hence, Fury for a temporary stat boost at the cost of losing HP after that combat.

The focus here is more on buffing allies than it is holding her own in combat.  With Hone Atk, Gale Dance, and Fortify Def, Azura can give a +4/+4/+4 after a dance - even without a Geyser Dance, she can use her C and Seal slot to give +4/+4. Whether you prefer offensive or defensive buffs is up to you.

Wings of Mercy is a typical B slot for Dancers, as it allows her to support her low HP teammates. It has an interesting synergy with Breath of Life that allows Azura to function as a pseudo-healer if any of your teammates have Hit and Run or are ranged- the gap between your unit and the enemy can be filled by Azura as she uses Wings of Mercy to rush in, kill off the low HP opponent, and heal the other unit.

• Preferred IV: +SPD or +RES / -HP or -DEF
• Weapon: Sapphire Lance / Deft Harpoon (+Res)
• Assist: Sing
• Special: Iceberg / Moonbow / Aether
• Passive A: Distant Counter
• Passive B: Wings of Mercy / Renewal / BTomebreaker
• Passive C: Spur Def/Res / Hone Atk
• Sacred Seal: Distant Def / Flexible

This Azura is a high-investment one and some may balk at sacrificing a Hector to your singer- however, Distant Counter not only allows Azura to increase her score potential in the Arena, but also offers her a utility of being able to counter ranged red threats on the enemy team- such as Winter Tharja.

Now, running Deft Harpoon is a double edged sword- er, lance- that requires you keeping her HP topped up in order to maintain her +2 to all stats from Deft Harpoon.  Both Aether and Renewal can help her with this, or you can run a healer to keep her health at the 100% HP requirement. Both Aether and Renewal also serve as score carry, to push her into higher tiers of Arena. This build is generally only recommended for those who wish to push the envelope in T20 while retaining a Singer on their team.

Still, it can prove to be very effective. With Deft Harpoon forges and buffs up, a +SPD/-HP Azura reaches a stat spread of 38/47/38/23/34, allowing her to counter both red and blue dragons, as well as most non-green ranged units you would come across. She can do all of this while still keeping her ability to Sing and refresh your other units’ turns.

Spur Def/Res is a high-SP cost C slot that will further boost Arena score, while supporting all of your defensive units regardless of whether they need boosts to their Defense or Resistance.  Distant Def goes in the Sacred Seal slot, which further allows her to tank mages. Her Resistance reaches an effective 40 when attacked from range in Enemy Phase.