Velouria

IVs of +Res -Atk because that's what I pulled.

Assist Slot can be anything and is largely unimportant.

Bslot would be Special Spiral and Seal would be Flashing Blade, but it wouldn't let me select either of those, so I opted for abilities that make no sense at this time.

The Idea? Spam Aethers like your email address won a lottery you never entered!

(Note: The Sacred Seal should be Flashing Blade 3, but it's not in the menu for some reason even though Velouria is Infantry.)

Weapon: Wolfpup Fang
Support: Reposition
Special: Noontime / Sol / Aether
A: Steady Breath / Distant Counter / Swift Sparrow 2
B: Wrath 3
C: Joint Hone Spd / Atk Smoke / Spd Smoke
S: Flashing Blade 3 / Quickened Pulse / Atk Smoke

This set aims to milk Wolfpup Fang's Special-boosting effects for all their worth. With a Double Wrath set, Velouria can launch vicious Specials that are guaranteed to do a minimum of 20 damage, and she's frail enough that pretty much any hit will trigger the HP-based Wrath. She can also stack cooldown reduction effects from allies on top of her own so that her Special is available right away, making her much harder to attack into than she seems at first glance.

For a rapid-fire Special user that is otherwise frail, the Special of choice is obviously of the self-healing variety. The guaranteed damage from Double Wrath means she will always heal from the Special, which heavily bolsters her Enemy Phase: she can be damaged into the Wrath threshold mid-combat and immediately retaliate, and should her Enemy Phase end below the HP threshold, she'll likely have the Special ready for the Player Phase. So long as enemies with derivatives of Guard / Bold Fighter / Wary Fighter are avoided, Velouria can punch holes in all but the sturdiest defensive formations.

The exact sets Velouria can run for Double Wrath are plentiful. Noontime and Warding Breath allow her to strike back with a Special with every melee counterattack, but provide the least healing over time. Aether will go off less often, but combined with Swift Sparrow on the Player Phase she can pull off a surprise OHKO to a stubborn enemy. Distant Counter and Sol are the middle-of-the-road option, giving her means to counter ranged units and being a more conventional tank.

The C skill and Sacred Seal depend on team composition. If she has a Beast or Dragon ally to start her turn beside, she can run Joint Hone Spd to improve the chances of activating Flashing Blade. If that's not possible or feasible, she can run Atk Smoke (or a combination of Spd Smoke and the Atk Smoke seal) to improve her chances of survival. If no allies are running cooldown reduction skills (Infantry Pulse, Ostia's Pulse), Quickened Pulse can be equipped in a Sol or Aether build to cover an extra point of cooldown on Turn 1, or she can stack it with ally cooldowns to prepare Aether right away.

This Dust Bunny is meant to absolutely fucking annihilate everything thanks to her hitting everything neutrally.
Wolfpup Fang is great just don't forget to always have her supported with someone because I believe even if it's C-Support they still get the buff.
She has surprisingly high defense allowing her to hit hard with Bonfire and even harder in Beast Mode.
Swift Sparrow is to give her more Atk and Spd to hit harder and double while Even Atk Wave and Darting Blow are there to help amplify this.
Finally Null-Follow because you're Colorless and don't have to fear anything armored unit because you can take a hit and while most definitely be doubling, and with Bonfire with the +10 Special Trigger not much will survive. Unless it's a dragon armored unit, then you're probably fucked.

(Pretend B slot is Null C-disrupt 3, for some reason it's not in the list of B skills)

The AR stat-stacking supertank goddess is here, summoners. Because Velouria has zero weaknesses being a colorless infantry beast (aside from Raventomes and the virtually non-existent Poison Dagger), is able to handle Veronica with Null C-Disrupt, and has an absolutely fantastic stat spread after a light blessing, Velouria is the prime candidate for an AR offense supertank.

If my theory-crafting is correct, given a light blessing, paired with Kaden and M!Corrin, given summoner support, and hit with def/res tactics, she reaches a defensive spread of 51/46. Yeah, you heard me. And that's 57/52 against ranged units with Distant Def! And, if you're crafty with your other units C- and S-slots, you can fit a drive or spur in Kaden's S-slot, assuming you keep Goad Beasts in his C.

Not to mention she'll be firing back with a colorless attack stat of 77(!!!) with +10 damage Sols (Assuming atk boon and Kaden having Goad Beasts). She'll also have a speed stat of 58. I'd like to see you try to outspeed that.

Her weapon, A slot and B slot are locks for this build. She needs these three for the build to function.

Reposition is my go-to assist, but you can run pretty much anything.

Her C-slot is very flexible. Joint Hone Spd or Odd Spd Wave might be good picks given how Spd Tactic is so rare, and how hard it can be to proc Spd/Res Link on Kaden. Another option is Savage Blow to chip enemy units and speed up those slow armor battles.

S-slot is also extremely flexible. I think Distant Def might be her best choice to tank Reinhardts, Veronicas, and Cecilias better, but she can run pretty much any seal ever and still put it to good use.

Velouria is looking to become the undisputed queen of AR offense, and if she gets demoted, or if you've already +10'd her, she will be actually unstoppable. All that's left now is for IS to release the skill inheritance update, and AR will be mine.

With this build Velouria should be able to take a hit then out right kill most units while still living. Null 3 makes it so she can take on armor meta, while on even turns she can usually tango with fast menaces like Ayra, Mia, and VA Ike. Moonbow may be better in some situations (like for for lukas or surtr) but glimmer will get the job done. Depending on preference, the brazen atk/def 3 seal, fierce stance 3 seal, or even darting stance 3 seal may also function better with Velouria if you don’t have a supportive healer to keep her healthy. Just remember to always keep her beast form as it adds more damage outright which she needs. Remember, Velouria is a physical unit who can kill most units given they attack first, but ahe has trouble with magic, especially our favorite guy on a horse, so keep her away and bate them in to engage. If given Distant Counter you may also want to consider distant defense over close, but I feel she runs better as a physical unit. This is only her defensive side mind you, she could very well run things desperation, swift sparrow 2, darting blow 3 seal, you name it given her already crazy speed.