New Year Gunnthrá

Weapon: Hikami (+EFF)

Assist: Positional Assist / Flexible

Special: Glimmer / Draconic Aura / Galeforce 

Passive A: Atk/Spd Catch / Swift Sparrow / Death Blow / Atk/Spd Push / Atk/Spd Solo

Passive B: Flow Guard / Dive-Bomb / Flow Refresh / S/D Near Trace / Desperation

Passive C: Spd/Def Rein / Smoke Skills / Joint Drive Atk / Savage Blow / Flexible

Sacred Seal: Swift Sparrow / Heavy Blade / Atk/Spd Form / Atk/Spd Solo

• Through Hikami’s assortment of readily available debuffs, New Year Gunnthrá’ can quickly maintain a rather significant stat differential between herself and her foe — and with the ability to inflict a maximum of -14 Def while gaining +24 Atk simultaneously with all of her sword’s effects into play, her damage becomes a particularly compelling selling point. This build emphasizes this latter quality to enable a full-out offensive approach, naturally making +ATK and +SPD IVs the most desirable choice.
• Glimmer and Draconic Aura are New Year Gunnthrá’s best Specials for damage-dealing purposes, scaling well with her high levels of raw Attack and damage while bearing reasonable activation rates. She can also equip Galeforce to reap the Special’s self-refreshing benefits, though this requires the Heavy Blade Sacred Seal to activate consistently in general play.
  • For Aether Raids Galeforce strategies, though, it’s better to use Heavy Blade as an A skill instead and couple this with the Quickened Pulse Sacred Seal; this lowers the maximum amount of initiations required to trigger Galeforce down to two, assuming Heavy Blade triggers and Guard isn’t in play.
• For her A skill, any ability that augments both of her offensive stats is recommended, with Atk/Spd Catch 4 being especially synergistic with her debuffing focus (as this allows for easy maintenance of its +9/+9 Atk/Spd bonus). Other notable options include Atk/Spd Push, Atk/Spd Solo, and even her base Swift Sparrow in a pinch, though one may also consider Death Blow for a more OHKO-focused approach.
• Flow Guard and Flow Refresh are exceptional A skills for their partial Null Follow-Up effects, allowing New Year Gunnthrá to ensure doubles as long as she outspeeds — the choice between the two depends on which of their secondary bonuses is preferred. Alternatively, Dive-Bomb maximizes her burst through the ability to double immediately at full HP, though this leaves her susceptible to follow-up denial effects (which Flow skills bypass) if she is unable to OHKO her foe, whereas S/D Near Trace enables a simple hit-and-run playstyle. Desperation works on a budget. 
• Both her C and Sacred Seal slots are open to anything that builds upon her damage potential further, including a variety of choices like Spd/Def Rein, Joint Drives, Atk/Spd Form, and more — simply equip what best suits your specific needs and availability. 

Weapon: Hikami (+EFF)

Assist: Positional Assist / Flexible

Special: Glimmer / Miracle

Passive A: Atk/Spd Catch / Atk/Spd Unity / Fury / Distant Storm / Distant Counter

Passive B: Vantage

Passive C: Atk/Def Rein / Joint Drive Atk / Smoke Skills / Savage Blow / Flexible

Sacred Seal: Atk/Spd Form / Heavy Blade / Atk/Spd Solo / Iote’s Shield

• As New Year Gunnthrá can heighten her raw damage output to such a high degree and do so easily in either phase, she also has the option of adopting an Vantage sweeping approach in the Enemy Phase; this highlights her ceiling to consistently defeat initiating foes in one strike upon losing enough HP. Accordingly, a +ATK IV is the top priority. 
• A skills that enables counterattacks regardless of range, such as Distant Storm and Distant Counter, are recommended primarily if seeking to have New Year Gunnthrá function as a main carry of sorts. 
  • However, this is somewhat finicky given her weakness to archers and inability to avoid counterattack-negation which most often tends to be on ranged foes — so if possible, it’s likely better to pair her with a Far Save ally and focus strictly on melee match-ups where she bears much greater consistency overall. In such instances, any A skill that enhances Attack works perfectly fine, with Atk/Spd Catch and Atk/Spd Unity offering the most stats possible.
• New Year Gunnthrá’s Special largely depends on whether increased damage or some safety is preferred. For the former, low cooldown options like Glimmer are fantastic for rapid-fire activations, and Glimmer particularly melds nicely with her high firepower. For the latter, she has the option of using Miracle as a safety leash in case she’s unable to avoid taking damage once, though it should ideally be paired with the Heavy Blade Sacred Seal to access it quickly enough.
• Atk/Def Rein, Joint Drive Atk, Savage Blow, and other skills that boost New Year Gunnthrá’s chance of landing OHKOs work excellently in her C slot, with even Smoke skills being worthwhile to ensure her foes are unable to escape being afflicted by her debuffs. The same logic applies to Sacred Seal selection, though Iote’s Shield is worth noting in her case to prevent her archer weakness from imposing on her gameplan.